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Finding the Fourth Proportional to 398,445.99, 549,839.44 and 217,154.04

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Solution

The fourth proportional to 398,445.99, 549,839.44 and 217,154.04 is: 299,663.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,445.99 : 549,839.44 = 217,154.04 : x
  2. Step 2: Convert to fraction form
    398,445.99/549,839.44 = 217,154.04/x
  3. Step 3: Cross multiply
    398,445.99x = 549,839.44 × 217,154.04
  4. Step 4: Simplify right side
    398,445.99x = 119,399,855,747.34
  5. Step 5: Solve for x
    x = 119,399,855,747.34/398,445.99
  6. Step 6: Final answer
    x = 299,663.84

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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.