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Finding the Fourth Proportional to 615,515.70, 923,143.95 and 260,541.30

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Solution

The fourth proportional to 615,515.70, 923,143.95 and 260,541.30 is: 390,757.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,515.70 : 923,143.95 = 260,541.30 : x
  2. Step 2: Convert to fraction form
    615,515.70/923,143.95 = 260,541.30/x
  3. Step 3: Cross multiply
    615,515.70x = 923,143.95 × 260,541.30
  4. Step 4: Simplify right side
    615,515.70x = 240,517,124,820.14
  5. Step 5: Solve for x
    x = 240,517,124,820.14/615,515.70
  6. Step 6: Final answer
    x = 390,757.09

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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.