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Finding the Fourth Proportional to 615,178.30, 921,903.45 and 489,034.30

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Solution

The fourth proportional to 615,178.30, 921,903.45 and 489,034.30 is: 732,864.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,178.30 : 921,903.45 = 489,034.30 : x
  2. Step 2: Convert to fraction form
    615,178.30/921,903.45 = 489,034.30/x
  3. Step 3: Cross multiply
    615,178.30x = 921,903.45 × 489,034.30
  4. Step 4: Simplify right side
    615,178.30x = 450,842,408,338.34
  5. Step 5: Solve for x
    x = 450,842,408,338.34/615,178.30
  6. Step 6: Final answer
    x = 732,864.62

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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.