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Finding the Fourth Proportional to 261,010.40, 391,541.44 and 83,472.80

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Solution

The fourth proportional to 261,010.40, 391,541.44 and 83,472.80 is: 125,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,010.40 : 391,541.44 = 83,472.80 : x
  2. Step 2: Convert to fraction form
    261,010.40/391,541.44 = 83,472.80/x
  3. Step 3: Cross multiply
    261,010.40x = 391,541.44 × 83,472.80
  4. Step 4: Simplify right side
    261,010.40x = 32,683,060,312.83
  5. Step 5: Solve for x
    x = 32,683,060,312.83/261,010.40
  6. Step 6: Final answer
    x = 125,217.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.