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Finding the Fourth Proportional to 315,840.52, 435,861.06 and 172,602.76

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Solution

The fourth proportional to 315,840.52, 435,861.06 and 172,602.76 is: 238,192.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,840.52 : 435,861.06 = 172,602.76 : x
  2. Step 2: Convert to fraction form
    315,840.52/435,861.06 = 172,602.76/x
  3. Step 3: Cross multiply
    315,840.52x = 435,861.06 × 172,602.76
  4. Step 4: Simplify right side
    315,840.52x = 75,230,821,932.53
  5. Step 5: Solve for x
    x = 75,230,821,932.53/315,840.52
  6. Step 6: Final answer
    x = 238,192.43

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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.