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Finding the Fourth Proportional to 386,553.40, 579,830.10 and 360,309.40

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Solution

The fourth proportional to 386,553.40, 579,830.10 and 360,309.40 is: 540,464.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,553.40 : 579,830.10 = 360,309.40 : x
  2. Step 2: Convert to fraction form
    386,553.40/579,830.10 = 360,309.40/x
  3. Step 3: Cross multiply
    386,553.40x = 579,830.10 × 360,309.40
  4. Step 4: Simplify right side
    386,553.40x = 208,918,235,432.94
  5. Step 5: Solve for x
    x = 208,918,235,432.94/386,553.40
  6. Step 6: Final answer
    x = 540,464.10

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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.