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Finding the Fourth Proportional to 312,658.18, 431,526.45 and 178,522.18

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Solution

The fourth proportional to 312,658.18, 431,526.45 and 178,522.18 is: 246,393.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,658.18 : 431,526.45 = 178,522.18 : x
  2. Step 2: Convert to fraction form
    312,658.18/431,526.45 = 178,522.18/x
  3. Step 3: Cross multiply
    312,658.18x = 431,526.45 × 178,522.18
  4. Step 4: Simplify right side
    312,658.18x = 77,037,042,581.66
  5. Step 5: Solve for x
    x = 77,037,042,581.66/312,658.18
  6. Step 6: Final answer
    x = 246,393.82

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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.