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Finding the Fourth Proportional to 398,139.04, 549,431.84 and 219,291.04

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Solution

The fourth proportional to 398,139.04, 549,431.84 and 219,291.04 is: 302,621.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,139.04 : 549,431.84 = 219,291.04 : x
  2. Step 2: Convert to fraction form
    398,139.04/549,431.84 = 219,291.04/x
  3. Step 3: Cross multiply
    398,139.04x = 549,431.84 × 219,291.04
  4. Step 4: Simplify right side
    398,139.04x = 120,485,479,602.71
  5. Step 5: Solve for x
    x = 120,485,479,602.71/398,139.04
  6. Step 6: Final answer
    x = 302,621.62

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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.