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Finding the Fourth Proportional to 875,228.80, 1,312,843.20 and 342,572.80

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Solution

The fourth proportional to 875,228.80, 1,312,843.20 and 342,572.80 is: 513,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,228.80 : 1,312,843.20 = 342,572.80 : x
  2. Step 2: Convert to fraction form
    875,228.80/1,312,843.20 = 342,572.80/x
  3. Step 3: Cross multiply
    875,228.80x = 1,312,843.20 × 342,572.80
  4. Step 4: Simplify right side
    875,228.80x = 449,744,370,984.96
  5. Step 5: Solve for x
    x = 449,744,370,984.96/875,228.80
  6. Step 6: Final answer
    x = 513,859.20

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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.