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Finding the Fourth Proportional to 389,710.20, 585,090.90 and 249,742.20

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Solution

The fourth proportional to 389,710.20, 585,090.90 and 249,742.20 is: 374,950.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,710.20 : 585,090.90 = 249,742.20 : x
  2. Step 2: Convert to fraction form
    389,710.20/585,090.90 = 249,742.20/x
  3. Step 3: Cross multiply
    389,710.20x = 585,090.90 × 249,742.20
  4. Step 4: Simplify right side
    389,710.20x = 146,121,888,565.98
  5. Step 5: Solve for x
    x = 146,121,888,565.98/389,710.20
  6. Step 6: Final answer
    x = 374,950.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.