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Finding the Fourth Proportional to 688,499,710.46, 950,163,311.13 and 387,179,853.90

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Solution

The fourth proportional to 688,499,710.46, 950,163,311.13 and 387,179,853.90 is: 534,327,155.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,499,710.46 : 950,163,311.13 = 387,179,853.90 : x
  2. Step 2: Convert to fraction form
    688,499,710.46/950,163,311.13 = 387,179,853.90/x
  3. Step 3: Cross multiply
    688,499,710.46x = 950,163,311.13 × 387,179,853.90
  4. Step 4: Simplify right side
    688,499,710.46x = 367,884,091,984,453,632
  5. Step 5: Solve for x
    x = 367,884,091,984,453,632/688,499,710.46
  6. Step 6: Final answer
    x = 534,327,155.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.