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Finding the Fourth Proportional to 713,145.30, 984,148.22 and 390,848.46

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Solution

The fourth proportional to 713,145.30, 984,148.22 and 390,848.46 is: 539,375.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,145.30 : 984,148.22 = 390,848.46 : x
  2. Step 2: Convert to fraction form
    713,145.30/984,148.22 = 390,848.46/x
  3. Step 3: Cross multiply
    713,145.30x = 984,148.22 × 390,848.46
  4. Step 4: Simplify right side
    713,145.30x = 384,652,816,198.74
  5. Step 5: Solve for x
    x = 384,652,816,198.74/713,145.30
  6. Step 6: Final answer
    x = 539,375.10

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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.