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Finding the Fourth Proportional to 402,438,420.80, 603,657,631.20 and 402,438,420.80

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Solution

The fourth proportional to 402,438,420.80, 603,657,631.20 and 402,438,420.80 is: 603,657,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,438,420.80 : 603,657,631.20 = 402,438,420.80 : x
  2. Step 2: Convert to fraction form
    402,438,420.80/603,657,631.20 = 402,438,420.80/x
  3. Step 3: Cross multiply
    402,438,420.80x = 603,657,631.20 × 402,438,420.80
  4. Step 4: Simplify right side
    402,438,420.80x = 242,935,023,803,996,832
  5. Step 5: Solve for x
    x = 242,935,023,803,996,832/402,438,420.80
  6. Step 6: Final answer
    x = 603,657,631.20

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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.