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Finding the Fourth Proportional to 653,459,787.20, 980,189,680.80 and 505,506,612.80

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Solution

The fourth proportional to 653,459,787.20, 980,189,680.80 and 505,506,612.80 is: 758,259,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,459,787.20 : 980,189,680.80 = 505,506,612.80 : x
  2. Step 2: Convert to fraction form
    653,459,787.20/980,189,680.80 = 505,506,612.80/x
  3. Step 3: Cross multiply
    653,459,787.20x = 980,189,680.80 × 505,506,612.80
  4. Step 4: Simplify right side
    653,459,787.20x = 495,492,365,442,721,152
  5. Step 5: Solve for x
    x = 495,492,365,442,721,152/653,459,787.20
  6. Step 6: Final answer
    x = 758,259,919.20

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Double scale
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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.