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Finding the Fourth Proportional to 515,114.80, 772,672.20 and 486,246.40

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Solution

The fourth proportional to 515,114.80, 772,672.20 and 486,246.40 is: 729,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,114.80 : 772,672.20 = 486,246.40 : x
  2. Step 2: Convert to fraction form
    515,114.80/772,672.20 = 486,246.40/x
  3. Step 3: Cross multiply
    515,114.80x = 772,672.20 × 486,246.40
  4. Step 4: Simplify right side
    515,114.80x = 375,709,075,630.08
  5. Step 5: Solve for x
    x = 375,709,075,630.08/515,114.80
  6. Step 6: Final answer
    x = 729,369.60

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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.