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Finding the Fourth Proportional to 545,316.78, 752,342.40 and 315,748.78

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Solution

The fourth proportional to 545,316.78, 752,342.40 and 315,748.78 is: 435,620.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,316.78 : 752,342.40 = 315,748.78 : x
  2. Step 2: Convert to fraction form
    545,316.78/752,342.40 = 315,748.78/x
  3. Step 3: Cross multiply
    545,316.78x = 752,342.40 × 315,748.78
  4. Step 4: Simplify right side
    545,316.78x = 237,551,193,061.42
  5. Step 5: Solve for x
    x = 237,551,193,061.42/545,316.78
  6. Step 6: Final answer
    x = 435,620.55

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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.