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Finding the Fourth Proportional to 398,026.10, 549,268.12 and 216,740.18

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Solution

The fourth proportional to 398,026.10, 549,268.12 and 216,740.18 is: 299,097.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,026.10 : 549,268.12 = 216,740.18 : x
  2. Step 2: Convert to fraction form
    398,026.10/549,268.12 = 216,740.18/x
  3. Step 3: Cross multiply
    398,026.10x = 549,268.12 × 216,740.18
  4. Step 4: Simplify right side
    398,026.10x = 119,048,471,197.06
  5. Step 5: Solve for x
    x = 119,048,471,197.06/398,026.10
  6. Step 6: Final answer
    x = 299,097.15

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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.