Home / 661,750,505.20-990,712,570.20-642,618,629.20

Finding the Fourth Proportional to 661,750,505.20, 990,712,570.20 and 642,618,629.20

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Solution

The fourth proportional to 661,750,505.20, 990,712,570.20 and 642,618,629.20 is: 962,070,068.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,750,505.20 : 990,712,570.20 = 642,618,629.20 : x
  2. Step 2: Convert to fraction form
    661,750,505.20/990,712,570.20 = 642,618,629.20/x
  3. Step 3: Cross multiply
    661,750,505.20x = 990,712,570.20 × 642,618,629.20
  4. Step 4: Simplify right side
    661,750,505.20x = 636,650,353,793,132,800
  5. Step 5: Solve for x
    x = 636,650,353,793,132,800/661,750,505.20
  6. Step 6: Final answer
    x = 962,070,068.39

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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.