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Finding the Fourth Proportional to 386,415.20, 579,622.80 and 356,002.40

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Solution

The fourth proportional to 386,415.20, 579,622.80 and 356,002.40 is: 534,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,415.20 : 579,622.80 = 356,002.40 : x
  2. Step 2: Convert to fraction form
    386,415.20/579,622.80 = 356,002.40/x
  3. Step 3: Cross multiply
    386,415.20x = 579,622.80 × 356,002.40
  4. Step 4: Simplify right side
    386,415.20x = 206,347,107,894.72
  5. Step 5: Solve for x
    x = 206,347,107,894.72/386,415.20
  6. Step 6: Final answer
    x = 534,003.60

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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.