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Finding the Fourth Proportional to 398,009.76, 549,251.13 and 216,721.26

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Solution

The fourth proportional to 398,009.76, 549,251.13 and 216,721.26 is: 299,074.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,009.76 : 549,251.13 = 216,721.26 : x
  2. Step 2: Convert to fraction form
    398,009.76/549,251.13 = 216,721.26/x
  3. Step 3: Cross multiply
    398,009.76x = 549,251.13 × 216,721.26
  4. Step 4: Simplify right side
    398,009.76x = 119,034,396,950.02
  5. Step 5: Solve for x
    x = 119,034,396,950.02/398,009.76
  6. Step 6: Final answer
    x = 299,074.07

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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.