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Finding the Fourth Proportional to 280,143.59, 420,477.82 and 130,487.18

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Solution

The fourth proportional to 280,143.59, 420,477.82 and 130,487.18 is: 195,853.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,143.59 : 420,477.82 = 130,487.18 : x
  2. Step 2: Convert to fraction form
    280,143.59/420,477.82 = 130,487.18/x
  3. Step 3: Cross multiply
    280,143.59x = 420,477.82 × 130,487.18
  4. Step 4: Simplify right side
    280,143.59x = 54,866,962,555.74
  5. Step 5: Solve for x
    x = 54,866,962,555.74/280,143.59
  6. Step 6: Final answer
    x = 195,853.00

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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.