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Finding the Fourth Proportional to 398,392.02, 549,780.99 and 217,103.88

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Solution

The fourth proportional to 398,392.02, 549,780.99 and 217,103.88 is: 299,603.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,392.02 : 549,780.99 = 217,103.88 : x
  2. Step 2: Convert to fraction form
    398,392.02/549,780.99 = 217,103.88/x
  3. Step 3: Cross multiply
    398,392.02x = 549,780.99 × 217,103.88
  4. Step 4: Simplify right side
    398,392.02x = 119,359,586,079.24
  5. Step 5: Solve for x
    x = 119,359,586,079.24/398,392.02
  6. Step 6: Final answer
    x = 299,603.36

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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.