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Finding the Fourth Proportional to 615,098.70, 921,870.45 and 548,225.10

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Solution

The fourth proportional to 615,098.70, 921,870.45 and 548,225.10 is: 821,644.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,098.70 : 921,870.45 = 548,225.10 : x
  2. Step 2: Convert to fraction form
    615,098.70/921,870.45 = 548,225.10/x
  3. Step 3: Cross multiply
    615,098.70x = 921,870.45 × 548,225.10
  4. Step 4: Simplify right side
    615,098.70x = 505,392,519,638.30
  5. Step 5: Solve for x
    x = 505,392,519,638.30/615,098.70
  6. Step 6: Final answer
    x = 821,644.59

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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.