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Finding the Fourth Proportional to 615,384.80, 923,172.24 and 260,400.80

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Solution

The fourth proportional to 615,384.80, 923,172.24 and 260,400.80 is: 390,641.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,384.80 : 923,172.24 = 260,400.80 : x
  2. Step 2: Convert to fraction form
    615,384.80/923,172.24 = 260,400.80/x
  3. Step 3: Cross multiply
    615,384.80x = 923,172.24 × 260,400.80
  4. Step 4: Simplify right side
    615,384.80x = 240,394,789,833.79
  5. Step 5: Solve for x
    x = 240,394,789,833.79/615,384.80
  6. Step 6: Final answer
    x = 390,641.42

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1.5x scale

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.