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Finding the Fourth Proportional to 625,355,781.60, 938,033,672.40 and 525,026,719.20

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Solution

The fourth proportional to 625,355,781.60, 938,033,672.40 and 525,026,719.20 is: 787,540,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,355,781.60 : 938,033,672.40 = 525,026,719.20 : x
  2. Step 2: Convert to fraction form
    625,355,781.60/938,033,672.40 = 525,026,719.20/x
  3. Step 3: Cross multiply
    625,355,781.60x = 938,033,672.40 × 525,026,719.20
  4. Step 4: Simplify right side
    625,355,781.60x = 492,492,741,519,299,584
  5. Step 5: Solve for x
    x = 492,492,741,519,299,584/625,355,781.60
  6. Step 6: Final answer
    x = 787,540,078.80

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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.