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Finding the Fourth Proportional to 262,243.20, 393,073.20 and 143,999.40

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Solution

The fourth proportional to 262,243.20, 393,073.20 and 143,999.40 is: 215,838.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,243.20 : 393,073.20 = 143,999.40 : x
  2. Step 2: Convert to fraction form
    262,243.20/393,073.20 = 143,999.40/x
  3. Step 3: Cross multiply
    262,243.20x = 393,073.20 × 143,999.40
  4. Step 4: Simplify right side
    262,243.20x = 56,602,304,956.08
  5. Step 5: Solve for x
    x = 56,602,304,956.08/262,243.20
  6. Step 6: Final answer
    x = 215,838.98

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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.