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Finding the Fourth Proportional to 389,643.20, 584,990.40 and 249,675.20

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Solution

The fourth proportional to 389,643.20, 584,990.40 and 249,675.20 is: 374,849.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,643.20 : 584,990.40 = 249,675.20 : x
  2. Step 2: Convert to fraction form
    389,643.20/584,990.40 = 249,675.20/x
  3. Step 3: Cross multiply
    389,643.20x = 584,990.40 × 249,675.20
  4. Step 4: Simplify right side
    389,643.20x = 146,057,595,118.08
  5. Step 5: Solve for x
    x = 146,057,595,118.08/389,643.20
  6. Step 6: Final answer
    x = 374,849.59

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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.