Home / 717,926.90-990,739.33-391,240.00

Finding the Fourth Proportional to 717,926.90, 990,739.33 and 391,240.00

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Solution

The fourth proportional to 717,926.90, 990,739.33 and 391,240.00 is: 539,911.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,926.90 : 990,739.33 = 391,240.00 : x
  2. Step 2: Convert to fraction form
    717,926.90/990,739.33 = 391,240.00/x
  3. Step 3: Cross multiply
    717,926.90x = 990,739.33 × 391,240.00
  4. Step 4: Simplify right side
    717,926.90x = 387,616,853,245.36
  5. Step 5: Solve for x
    x = 387,616,853,245.36/717,926.90
  6. Step 6: Final answer
    x = 539,911.31

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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.