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Finding the Fourth Proportional to 615,546.90, 923,320.35 and 405,422.10

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Solution

The fourth proportional to 615,546.90, 923,320.35 and 405,422.10 is: 608,133.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,546.90 : 923,320.35 = 405,422.10 : x
  2. Step 2: Convert to fraction form
    615,546.90/923,320.35 = 405,422.10/x
  3. Step 3: Cross multiply
    615,546.90x = 923,320.35 × 405,422.10
  4. Step 4: Simplify right side
    615,546.90x = 374,334,475,269.74
  5. Step 5: Solve for x
    x = 374,334,475,269.74/615,546.90
  6. Step 6: Final answer
    x = 608,133.15

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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.