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Finding the Fourth Proportional to 867,637.20, 1,299,727.80 and 763,726.80

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Solution

The fourth proportional to 867,637.20, 1,299,727.80 and 763,726.80 is: 1,144,069.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,637.20 : 1,299,727.80 = 763,726.80 : x
  2. Step 2: Convert to fraction form
    867,637.20/1,299,727.80 = 763,726.80/x
  3. Step 3: Cross multiply
    867,637.20x = 1,299,727.80 × 763,726.80
  4. Step 4: Simplify right side
    867,637.20x = 992,636,953,565.04
  5. Step 5: Solve for x
    x = 992,636,953,565.04/867,637.20
  6. Step 6: Final answer
    x = 1,144,069.15

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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.