Home / 390,291.22-582,139.13-378,478.18

Finding the Fourth Proportional to 390,291.22, 582,139.13 and 378,478.18

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Solution

The fourth proportional to 390,291.22, 582,139.13 and 378,478.18 is: 564,519.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,291.22 : 582,139.13 = 378,478.18 : x
  2. Step 2: Convert to fraction form
    390,291.22/582,139.13 = 378,478.18/x
  3. Step 3: Cross multiply
    390,291.22x = 582,139.13 × 378,478.18
  4. Step 4: Simplify right side
    390,291.22x = 220,326,958,429.18
  5. Step 5: Solve for x
    x = 220,326,958,429.18/390,291.22
  6. Step 6: Final answer
    x = 564,519.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.