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Finding the Fourth Proportional to 312,557.80, 431,330.82 and 169,317.40

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Solution

The fourth proportional to 312,557.80, 431,330.82 and 169,317.40 is: 233,658.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,557.80 : 431,330.82 = 169,317.40 : x
  2. Step 2: Convert to fraction form
    312,557.80/431,330.82 = 169,317.40/x
  3. Step 3: Cross multiply
    312,557.80x = 431,330.82 × 169,317.40
  4. Step 4: Simplify right side
    312,557.80x = 73,031,812,982.27
  5. Step 5: Solve for x
    x = 73,031,812,982.27/312,557.80
  6. Step 6: Final answer
    x = 233,658.58

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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.