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Finding the Fourth Proportional to 470,981.80, 649,726.36 and 279,859.87

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Solution

The fourth proportional to 470,981.80, 649,726.36 and 279,859.87 is: 386,070.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,981.80 : 649,726.36 = 279,859.87 : x
  2. Step 2: Convert to fraction form
    470,981.80/649,726.36 = 279,859.87/x
  3. Step 3: Cross multiply
    470,981.80x = 649,726.36 × 279,859.87
  4. Step 4: Simplify right side
    470,981.80x = 181,832,334,645.17
  5. Step 5: Solve for x
    x = 181,832,334,645.17/470,981.80
  6. Step 6: Final answer
    x = 386,070.83

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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.