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Finding the Fourth Proportional to 658,643.04, 908,548.38 and 396,816.48

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Solution

The fourth proportional to 658,643.04, 908,548.38 and 396,816.48 is: 547,378.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,643.04 : 908,548.38 = 396,816.48 : x
  2. Step 2: Convert to fraction form
    658,643.04/908,548.38 = 396,816.48/x
  3. Step 3: Cross multiply
    658,643.04x = 908,548.38 × 396,816.48
  4. Step 4: Simplify right side
    658,643.04x = 360,526,970,061.30
  5. Step 5: Solve for x
    x = 360,526,970,061.30/658,643.04
  6. Step 6: Final answer
    x = 547,378.39

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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.