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Finding the Fourth Proportional to 280,543.96, 420,819.30 and 93,555.40

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Solution

The fourth proportional to 280,543.96, 420,819.30 and 93,555.40 is: 140,334.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,543.96 : 420,819.30 = 93,555.40 : x
  2. Step 2: Convert to fraction form
    280,543.96/420,819.30 = 93,555.40/x
  3. Step 3: Cross multiply
    280,543.96x = 420,819.30 × 93,555.40
  4. Step 4: Simplify right side
    280,543.96x = 39,369,917,939.22
  5. Step 5: Solve for x
    x = 39,369,917,939.22/280,543.96
  6. Step 6: Final answer
    x = 140,334.22

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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.