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Finding the Fourth Proportional to 398,380.32, 549,759.84 and 217,100.16

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Solution

The fourth proportional to 398,380.32, 549,759.84 and 217,100.16 is: 299,595.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,380.32 : 549,759.84 = 217,100.16 : x
  2. Step 2: Convert to fraction form
    398,380.32/549,759.84 = 217,100.16/x
  3. Step 3: Cross multiply
    398,380.32x = 549,759.84 × 217,100.16
  4. Step 4: Simplify right side
    398,380.32x = 119,352,949,225.57
  5. Step 5: Solve for x
    x = 119,352,949,225.57/398,380.32
  6. Step 6: Final answer
    x = 299,595.50

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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.