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Finding the Fourth Proportional to 421,417.12, 581,508 and 249,340.36

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Solution

The fourth proportional to 421,417.12, 581,508 and 249,340.36 is: 344,061.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,417.12 : 581,508 = 249,340.36 : x
  2. Step 2: Convert to fraction form
    421,417.12/581,508 = 249,340.36/x
  3. Step 3: Cross multiply
    421,417.12x = 581,508 × 249,340.36
  4. Step 4: Simplify right side
    421,417.12x = 144,993,414,062.88
  5. Step 5: Solve for x
    x = 144,993,414,062.88/421,417.12
  6. Step 6: Final answer
    x = 344,061.52

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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.