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Finding the Fourth Proportional to 630,657.60, 945,986.40 and 620,289.60

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Solution

The fourth proportional to 630,657.60, 945,986.40 and 620,289.60 is: 930,434.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,657.60 : 945,986.40 = 620,289.60 : x
  2. Step 2: Convert to fraction form
    630,657.60/945,986.40 = 620,289.60/x
  3. Step 3: Cross multiply
    630,657.60x = 945,986.40 × 620,289.60
  4. Step 4: Simplify right side
    630,657.60x = 586,785,525,661.44
  5. Step 5: Solve for x
    x = 586,785,525,661.44/630,657.60
  6. Step 6: Final answer
    x = 930,434.40

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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.