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Finding the Fourth Proportional to 398,501.10, 549,927.72 and 217,213.02

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Solution

The fourth proportional to 398,501.10, 549,927.72 and 217,213.02 is: 299,751.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,501.10 : 549,927.72 = 217,213.02 : x
  2. Step 2: Convert to fraction form
    398,501.10/549,927.72 = 217,213.02/x
  3. Step 3: Cross multiply
    398,501.10x = 549,927.72 × 217,213.02
  4. Step 4: Simplify right side
    398,501.10x = 119,451,460,842.91
  5. Step 5: Solve for x
    x = 119,451,460,842.91/398,501.10
  6. Step 6: Final answer
    x = 299,751.90

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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.