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Finding the Fourth Proportional to 398,607,310.80, 597,910,966.20 and 360,343,558.80

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Solution

The fourth proportional to 398,607,310.80, 597,910,966.20 and 360,343,558.80 is: 540,515,338.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,607,310.80 : 597,910,966.20 = 360,343,558.80 : x
  2. Step 2: Convert to fraction form
    398,607,310.80/597,910,966.20 = 360,343,558.80/x
  3. Step 3: Cross multiply
    398,607,310.80x = 597,910,966.20 × 360,343,558.80
  4. Step 4: Simplify right side
    398,607,310.80x = 215,453,365,406,054,528
  5. Step 5: Solve for x
    x = 215,453,365,406,054,528/398,607,310.80
  6. Step 6: Final answer
    x = 540,515,338.20

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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.