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Finding the Fourth Proportional to 310,545.76, 428,484.72 and 197,534.56

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Solution

The fourth proportional to 310,545.76, 428,484.72 and 197,534.56 is: 272,554.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,545.76 : 428,484.72 = 197,534.56 : x
  2. Step 2: Convert to fraction form
    310,545.76/428,484.72 = 197,534.56/x
  3. Step 3: Cross multiply
    310,545.76x = 428,484.72 × 197,534.56
  4. Step 4: Simplify right side
    310,545.76x = 84,640,540,631.92
  5. Step 5: Solve for x
    x = 84,640,540,631.92/310,545.76
  6. Step 6: Final answer
    x = 272,554.17

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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.