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Finding the Fourth Proportional to 393,073.12, 542,442.96 and 223,316.96

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Solution

The fourth proportional to 393,073.12, 542,442.96 and 223,316.96 is: 308,178.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,073.12 : 542,442.96 = 223,316.96 : x
  2. Step 2: Convert to fraction form
    393,073.12/542,442.96 = 223,316.96/x
  3. Step 3: Cross multiply
    393,073.12x = 542,442.96 × 223,316.96
  4. Step 4: Simplify right side
    393,073.12x = 121,136,712,800.60
  5. Step 5: Solve for x
    x = 121,136,712,800.60/393,073.12
  6. Step 6: Final answer
    x = 308,178.57

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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.