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Finding the Fourth Proportional to 315,425.52, 435,270.59 and 172,157.76

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Solution

The fourth proportional to 315,425.52, 435,270.59 and 172,157.76 is: 237,568.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,425.52 : 435,270.59 = 172,157.76 : x
  2. Step 2: Convert to fraction form
    315,425.52/435,270.59 = 172,157.76/x
  3. Step 3: Cross multiply
    315,425.52x = 435,270.59 × 172,157.76
  4. Step 4: Simplify right side
    315,425.52x = 74,935,209,768.28
  5. Step 5: Solve for x
    x = 74,935,209,768.28/315,425.52
  6. Step 6: Final answer
    x = 237,568.63

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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.