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Finding the Fourth Proportional to 280,987.68, 421,482.48 and 70,624.32

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Solution

The fourth proportional to 280,987.68, 421,482.48 and 70,624.32 is: 105,936.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,987.68 : 421,482.48 = 70,624.32 : x
  2. Step 2: Convert to fraction form
    280,987.68/421,482.48 = 70,624.32/x
  3. Step 3: Cross multiply
    280,987.68x = 421,482.48 × 70,624.32
  4. Step 4: Simplify right side
    280,987.68x = 29,766,913,541.91
  5. Step 5: Solve for x
    x = 29,766,913,541.91/280,987.68
  6. Step 6: Final answer
    x = 105,936.72

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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.