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Finding the Fourth Proportional to 386,210.16, 579,107.88 and 136,859.76

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Solution

The fourth proportional to 386,210.16, 579,107.88 and 136,859.76 is: 205,216.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,210.16 : 579,107.88 = 136,859.76 : x
  2. Step 2: Convert to fraction form
    386,210.16/579,107.88 = 136,859.76/x
  3. Step 3: Cross multiply
    386,210.16x = 579,107.88 × 136,859.76
  4. Step 4: Simplify right side
    386,210.16x = 79,256,565,470.91
  5. Step 5: Solve for x
    x = 79,256,565,470.91/386,210.16
  6. Step 6: Final answer
    x = 205,216.16

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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.