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Finding the Fourth Proportional to 875,576.80, 1,312,393.20 and 342,920.80

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Solution

The fourth proportional to 875,576.80, 1,312,393.20 and 342,920.80 is: 514,000.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,576.80 : 1,312,393.20 = 342,920.80 : x
  2. Step 2: Convert to fraction form
    875,576.80/1,312,393.20 = 342,920.80/x
  3. Step 3: Cross multiply
    875,576.80x = 1,312,393.20 × 342,920.80
  4. Step 4: Simplify right side
    875,576.80x = 450,046,926,058.56
  5. Step 5: Solve for x
    x = 450,046,926,058.56/875,576.80
  6. Step 6: Final answer
    x = 514,000.51

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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.