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Finding the Fourth Proportional to 642,548.76, 886,722.52 and 356,073.60

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Solution

The fourth proportional to 642,548.76, 886,722.52 and 356,073.60 is: 491,384.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,548.76 : 886,722.52 = 356,073.60 : x
  2. Step 2: Convert to fraction form
    642,548.76/886,722.52 = 356,073.60/x
  3. Step 3: Cross multiply
    642,548.76x = 886,722.52 × 356,073.60
  4. Step 4: Simplify right side
    642,548.76x = 315,738,479,897.47
  5. Step 5: Solve for x
    x = 315,738,479,897.47/642,548.76
  6. Step 6: Final answer
    x = 491,384.47

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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.