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Finding the Fourth Proportional to 412,931.40, 619,251.30 and 146,700.60

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Solution

The fourth proportional to 412,931.40, 619,251.30 and 146,700.60 is: 219,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,931.40 : 619,251.30 = 146,700.60 : x
  2. Step 2: Convert to fraction form
    412,931.40/619,251.30 = 146,700.60/x
  3. Step 3: Cross multiply
    412,931.40x = 619,251.30 × 146,700.60
  4. Step 4: Simplify right side
    412,931.40x = 90,844,537,260.78
  5. Step 5: Solve for x
    x = 90,844,537,260.78/412,931.40
  6. Step 6: Final answer
    x = 219,999.10

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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.