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Finding the Fourth Proportional to 310,424.92, 428,421.90 and 172,617.59

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Solution

The fourth proportional to 310,424.92, 428,421.90 and 172,617.59 is: 238,232.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,424.92 : 428,421.90 = 172,617.59 : x
  2. Step 2: Convert to fraction form
    310,424.92/428,421.90 = 172,617.59/x
  3. Step 3: Cross multiply
    310,424.92x = 428,421.90 × 172,617.59
  4. Step 4: Simplify right side
    310,424.92x = 73,953,154,542.40
  5. Step 5: Solve for x
    x = 73,953,154,542.40/310,424.92
  6. Step 6: Final answer
    x = 238,232.02

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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.