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Finding the Fourth Proportional to 398,508.02, 549,937.46 and 217,219.94

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Solution

The fourth proportional to 398,508.02, 549,937.46 and 217,219.94 is: 299,761.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,508.02 : 549,937.46 = 217,219.94 : x
  2. Step 2: Convert to fraction form
    398,508.02/549,937.46 = 217,219.94/x
  3. Step 3: Cross multiply
    398,508.02x = 549,937.46 × 217,219.94
  4. Step 4: Simplify right side
    398,508.02x = 119,457,382,064.95
  5. Step 5: Solve for x
    x = 119,457,382,064.95/398,508.02
  6. Step 6: Final answer
    x = 299,761.55

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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.