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Finding the Fourth Proportional to 549,034.68, 756,984.60 and 420,132.90

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Solution

The fourth proportional to 549,034.68, 756,984.60 and 420,132.90 is: 579,260.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,034.68 : 756,984.60 = 420,132.90 : x
  2. Step 2: Convert to fraction form
    549,034.68/756,984.60 = 420,132.90/x
  3. Step 3: Cross multiply
    549,034.68x = 756,984.60 × 420,132.90
  4. Step 4: Simplify right side
    549,034.68x = 318,034,135,253.34
  5. Step 5: Solve for x
    x = 318,034,135,253.34/549,034.68
  6. Step 6: Final answer
    x = 579,260.56

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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.