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Finding the Fourth Proportional to 673,862.62, 929,820.65 and 398,182.11

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Solution

The fourth proportional to 673,862.62, 929,820.65 and 398,182.11 is: 549,426.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,862.62 : 929,820.65 = 398,182.11 : x
  2. Step 2: Convert to fraction form
    673,862.62/929,820.65 = 398,182.11/x
  3. Step 3: Cross multiply
    673,862.62x = 929,820.65 × 398,182.11
  4. Step 4: Simplify right side
    673,862.62x = 370,237,948,338.57
  5. Step 5: Solve for x
    x = 370,237,948,338.57/673,862.62
  6. Step 6: Final answer
    x = 549,426.45

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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.