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Finding the Fourth Proportional to 280,423.59, 386,982.57 and 153,099.18

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Solution

The fourth proportional to 280,423.59, 386,982.57 and 153,099.18 is: 211,275.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,423.59 : 386,982.57 = 153,099.18 : x
  2. Step 2: Convert to fraction form
    280,423.59/386,982.57 = 153,099.18/x
  3. Step 3: Cross multiply
    280,423.59x = 386,982.57 × 153,099.18
  4. Step 4: Simplify right side
    280,423.59x = 59,246,714,284.82
  5. Step 5: Solve for x
    x = 59,246,714,284.82/280,423.59
  6. Step 6: Final answer
    x = 211,275.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.