Home / 390,932.20-586,398.30-255,629.80

Finding the Fourth Proportional to 390,932.20, 586,398.30 and 255,629.80

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Solution

The fourth proportional to 390,932.20, 586,398.30 and 255,629.80 is: 383,444.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,932.20 : 586,398.30 = 255,629.80 : x
  2. Step 2: Convert to fraction form
    390,932.20/586,398.30 = 255,629.80/x
  3. Step 3: Cross multiply
    390,932.20x = 586,398.30 × 255,629.80
  4. Step 4: Simplify right side
    390,932.20x = 149,900,880,149.34
  5. Step 5: Solve for x
    x = 149,900,880,149.34/390,932.20
  6. Step 6: Final answer
    x = 383,444.70

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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.