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Finding the Fourth Proportional to 398,392.12, 549,767.14 and 217,100.35

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Solution

The fourth proportional to 398,392.12, 549,767.14 and 217,100.35 is: 299,590.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,392.12 : 549,767.14 = 217,100.35 : x
  2. Step 2: Convert to fraction form
    398,392.12/549,767.14 = 217,100.35/x
  3. Step 3: Cross multiply
    398,392.12x = 549,767.14 × 217,100.35
  4. Step 4: Simplify right side
    398,392.12x = 119,354,638,512.50
  5. Step 5: Solve for x
    x = 119,354,638,512.50/398,392.12
  6. Step 6: Final answer
    x = 299,590.86

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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.