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Finding the Fourth Proportional to 395,147.70, 592,721.55 and 316,415.70

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Solution

The fourth proportional to 395,147.70, 592,721.55 and 316,415.70 is: 474,623.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,147.70 : 592,721.55 = 316,415.70 : x
  2. Step 2: Convert to fraction form
    395,147.70/592,721.55 = 316,415.70/x
  3. Step 3: Cross multiply
    395,147.70x = 592,721.55 × 316,415.70
  4. Step 4: Simplify right side
    395,147.70x = 187,546,404,148.34
  5. Step 5: Solve for x
    x = 187,546,404,148.34/395,147.70
  6. Step 6: Final answer
    x = 474,623.55

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.