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Finding the Fourth Proportional to 717,393.56, 990,047.86 and 395,103.56

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Solution

The fourth proportional to 717,393.56, 990,047.86 and 395,103.56 is: 545,267.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,393.56 : 990,047.86 = 395,103.56 : x
  2. Step 2: Convert to fraction form
    717,393.56/990,047.86 = 395,103.56/x
  3. Step 3: Cross multiply
    717,393.56x = 990,047.86 × 395,103.56
  4. Step 4: Simplify right side
    717,393.56x = 391,171,428,118.38
  5. Step 5: Solve for x
    x = 391,171,428,118.38/717,393.56
  6. Step 6: Final answer
    x = 545,267.55

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Double scale
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Similar ratio
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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.