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Finding the Fourth Proportional to 421,979.64, 632,950.02 and 155,722.92

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Solution

The fourth proportional to 421,979.64, 632,950.02 and 155,722.92 is: 233,577.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,979.64 : 632,950.02 = 155,722.92 : x
  2. Step 2: Convert to fraction form
    421,979.64/632,950.02 = 155,722.92/x
  3. Step 3: Cross multiply
    421,979.64x = 632,950.02 × 155,722.92
  4. Step 4: Simplify right side
    421,979.64x = 98,564,825,328.46
  5. Step 5: Solve for x
    x = 98,564,825,328.46/421,979.64
  6. Step 6: Final answer
    x = 233,577.21

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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.