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Finding the Fourth Proportional to 398,394.89, 549,777.58 and 217,108.08

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Solution

The fourth proportional to 398,394.89, 549,777.58 and 217,108.08 is: 299,605.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,394.89 : 549,777.58 = 217,108.08 : x
  2. Step 2: Convert to fraction form
    398,394.89/549,777.58 = 217,108.08/x
  3. Step 3: Cross multiply
    398,394.89x = 549,777.58 × 217,108.08
  4. Step 4: Simplify right side
    398,394.89x = 119,361,154,278.08
  5. Step 5: Solve for x
    x = 119,361,154,278.08/398,394.89
  6. Step 6: Final answer
    x = 299,605.13

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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.