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Finding the Fourth Proportional to 398,407.08, 549,787.86 and 217,115.34

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Solution

The fourth proportional to 398,407.08, 549,787.86 and 217,115.34 is: 299,611.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,407.08 : 549,787.86 = 217,115.34 : x
  2. Step 2: Convert to fraction form
    398,407.08/549,787.86 = 217,115.34/x
  3. Step 3: Cross multiply
    398,407.08x = 549,787.86 × 217,115.34
  4. Step 4: Simplify right side
    398,407.08x = 119,367,378,151.77
  5. Step 5: Solve for x
    x = 119,367,378,151.77/398,407.08
  6. Step 6: Final answer
    x = 299,611.59

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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.