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Finding the Fourth Proportional to 615,865.20, 923,106.60 and 260,818.80

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Solution

The fourth proportional to 615,865.20, 923,106.60 and 260,818.80 is: 390,935.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,865.20 : 923,106.60 = 260,818.80 : x
  2. Step 2: Convert to fraction form
    615,865.20/923,106.60 = 260,818.80/x
  3. Step 3: Cross multiply
    615,865.20x = 923,106.60 × 260,818.80
  4. Step 4: Simplify right side
    615,865.20x = 240,763,555,684.08
  5. Step 5: Solve for x
    x = 240,763,555,684.08/615,865.20
  6. Step 6: Final answer
    x = 390,935.48

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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.