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Finding the Fourth Proportional to 398,159.69, 549,461.13 and 216,871.06

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Solution

The fourth proportional to 398,159.69, 549,461.13 and 216,871.06 is: 299,282.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,159.69 : 549,461.13 = 216,871.06 : x
  2. Step 2: Convert to fraction form
    398,159.69/549,461.13 = 216,871.06/x
  3. Step 3: Cross multiply
    398,159.69x = 549,461.13 × 216,871.06
  4. Step 4: Simplify right side
    398,159.69x = 119,162,217,691.90
  5. Step 5: Solve for x
    x = 119,162,217,691.90/398,159.69
  6. Step 6: Final answer
    x = 299,282.48

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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.