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Finding the Fourth Proportional to 386,401.10, 579,601.65 and 329,320.40

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Solution

The fourth proportional to 386,401.10, 579,601.65 and 329,320.40 is: 493,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,401.10 : 579,601.65 = 329,320.40 : x
  2. Step 2: Convert to fraction form
    386,401.10/579,601.65 = 329,320.40/x
  3. Step 3: Cross multiply
    386,401.10x = 579,601.65 × 329,320.40
  4. Step 4: Simplify right side
    386,401.10x = 190,874,647,218.66
  5. Step 5: Solve for x
    x = 190,874,647,218.66/386,401.10
  6. Step 6: Final answer
    x = 493,980.60

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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.