Home / 438,628.80-657,943.20-391,972.80

Finding the Fourth Proportional to 438,628.80, 657,943.20 and 391,972.80

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Solution

The fourth proportional to 438,628.80, 657,943.20 and 391,972.80 is: 587,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,628.80 : 657,943.20 = 391,972.80 : x
  2. Step 2: Convert to fraction form
    438,628.80/657,943.20 = 391,972.80/x
  3. Step 3: Cross multiply
    438,628.80x = 657,943.20 × 391,972.80
  4. Step 4: Simplify right side
    438,628.80x = 257,895,838,344.96
  5. Step 5: Solve for x
    x = 257,895,838,344.96/438,628.80
  6. Step 6: Final answer
    x = 587,959.20

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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.