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Finding the Fourth Proportional to 645,340.60, 968,010.90 and 620,846.20

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Solution

The fourth proportional to 645,340.60, 968,010.90 and 620,846.20 is: 931,269.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,340.60 : 968,010.90 = 620,846.20 : x
  2. Step 2: Convert to fraction form
    645,340.60/968,010.90 = 620,846.20/x
  3. Step 3: Cross multiply
    645,340.60x = 968,010.90 × 620,846.20
  4. Step 4: Simplify right side
    645,340.60x = 600,985,888,823.58
  5. Step 5: Solve for x
    x = 600,985,888,823.58/645,340.60
  6. Step 6: Final answer
    x = 931,269.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.