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Finding the Fourth Proportional to 717,538.91, 990,118.69 and 407,420.48

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Solution

The fourth proportional to 717,538.91, 990,118.69 and 407,420.48 is: 562,192.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,538.91 : 990,118.69 = 407,420.48 : x
  2. Step 2: Convert to fraction form
    717,538.91/990,118.69 = 407,420.48/x
  3. Step 3: Cross multiply
    717,538.91x = 990,118.69 × 407,420.48
  4. Step 4: Simplify right side
    717,538.91x = 403,394,633,393.52
  5. Step 5: Solve for x
    x = 403,394,633,393.52/717,538.91
  6. Step 6: Final answer
    x = 562,192.00

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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.