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Finding the Fourth Proportional to 717,887.66, 990,672.22 and 391,203.52

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Solution

The fourth proportional to 717,887.66, 990,672.22 and 391,203.52 is: 539,853.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,887.66 : 990,672.22 = 391,203.52 : x
  2. Step 2: Convert to fraction form
    717,887.66/990,672.22 = 391,203.52/x
  3. Step 3: Cross multiply
    717,887.66x = 990,672.22 × 391,203.52
  4. Step 4: Simplify right side
    717,887.66x = 387,554,463,215.07
  5. Step 5: Solve for x
    x = 387,554,463,215.07/717,887.66
  6. Step 6: Final answer
    x = 539,853.91

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1.5x scale

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.