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Finding the Fourth Proportional to 390,952.52, 539,758.74 and 268,655.48

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Solution

The fourth proportional to 390,952.52, 539,758.74 and 268,655.48 is: 370,912.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,952.52 : 539,758.74 = 268,655.48 : x
  2. Step 2: Convert to fraction form
    390,952.52/539,758.74 = 268,655.48/x
  3. Step 3: Cross multiply
    390,952.52x = 539,758.74 × 268,655.48
  4. Step 4: Simplify right side
    390,952.52x = 145,009,143,378.90
  5. Step 5: Solve for x
    x = 145,009,143,378.90/390,952.52
  6. Step 6: Final answer
    x = 370,912.42

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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.