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Finding the Fourth Proportional to 386,434.80, 579,652.20 and 370,882.80

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Solution

The fourth proportional to 386,434.80, 579,652.20 and 370,882.80 is: 556,324.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,434.80 : 579,652.20 = 370,882.80 : x
  2. Step 2: Convert to fraction form
    386,434.80/579,652.20 = 370,882.80/x
  3. Step 3: Cross multiply
    386,434.80x = 579,652.20 × 370,882.80
  4. Step 4: Simplify right side
    386,434.80x = 214,983,030,962.16
  5. Step 5: Solve for x
    x = 214,983,030,962.16/386,434.80
  6. Step 6: Final answer
    x = 556,324.20

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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.