Home / 717,742.86-990,476.00-391,069.49

Finding the Fourth Proportional to 717,742.86, 990,476.00 and 391,069.49

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Solution

The fourth proportional to 717,742.86, 990,476.00 and 391,069.49 is: 539,670.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,742.86 : 990,476.00 = 391,069.49 : x
  2. Step 2: Convert to fraction form
    717,742.86/990,476.00 = 391,069.49/x
  3. Step 3: Cross multiply
    717,742.86x = 990,476.00 × 391,069.49
  4. Step 4: Simplify right side
    717,742.86x = 387,344,937,269.51
  5. Step 5: Solve for x
    x = 387,344,937,269.51/717,742.86
  6. Step 6: Final answer
    x = 539,670.90

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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.