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Finding the Fourth Proportional to 253,166.40, 379,807.20 and 147,931.20

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Solution

The fourth proportional to 253,166.40, 379,807.20 and 147,931.20 is: 221,930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,166.40 : 379,807.20 = 147,931.20 : x
  2. Step 2: Convert to fraction form
    253,166.40/379,807.20 = 147,931.20/x
  3. Step 3: Cross multiply
    253,166.40x = 379,807.20 × 147,931.20
  4. Step 4: Simplify right side
    253,166.40x = 56,185,334,864.64
  5. Step 5: Solve for x
    x = 56,185,334,864.64/253,166.40
  6. Step 6: Final answer
    x = 221,930.46

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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.