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Finding the Fourth Proportional to 478,962,005.80, 718,443,008.70 and 220,681,679.80

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Solution

The fourth proportional to 478,962,005.80, 718,443,008.70 and 220,681,679.80 is: 331,022,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,962,005.80 : 718,443,008.70 = 220,681,679.80 : x
  2. Step 2: Convert to fraction form
    478,962,005.80/718,443,008.70 = 220,681,679.80/x
  3. Step 3: Cross multiply
    478,962,005.80x = 718,443,008.70 × 220,681,679.80
  4. Step 4: Simplify right side
    478,962,005.80x = 158,547,210,000,482,048
  5. Step 5: Solve for x
    x = 158,547,210,000,482,048/478,962,005.80
  6. Step 6: Final answer
    x = 331,022,519.70

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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.