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Finding the Fourth Proportional to 398,389.04, 549,776.96 and 217,101.12

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Solution

The fourth proportional to 398,389.04, 549,776.96 and 217,101.12 is: 299,599.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,389.04 : 549,776.96 = 217,101.12 : x
  2. Step 2: Convert to fraction form
    398,389.04/549,776.96 = 217,101.12/x
  3. Step 3: Cross multiply
    398,389.04x = 549,776.96 × 217,101.12
  4. Step 4: Simplify right side
    398,389.04x = 119,357,193,766.20
  5. Step 5: Solve for x
    x = 119,357,193,766.20/398,389.04
  6. Step 6: Final answer
    x = 299,599.59

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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.