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Finding the Fourth Proportional to 280,988.28, 421,482.78 and 114,776.28

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Solution

The fourth proportional to 280,988.28, 421,482.78 and 114,776.28 is: 172,164.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,988.28 : 421,482.78 = 114,776.28 : x
  2. Step 2: Convert to fraction form
    280,988.28/421,482.78 = 114,776.28/x
  3. Step 3: Cross multiply
    280,988.28x = 421,482.78 × 114,776.28
  4. Step 4: Simplify right side
    280,988.28x = 48,376,225,572.46
  5. Step 5: Solve for x
    x = 48,376,225,572.46/280,988.28
  6. Step 6: Final answer
    x = 172,164.57

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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.