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Finding the Fourth Proportional to 858,838, 1,288,397.76 and 353,261.92

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Solution

The fourth proportional to 858,838, 1,288,397.76 and 353,261.92 is: 529,950.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,838 : 1,288,397.76 = 353,261.92 : x
  2. Step 2: Convert to fraction form
    858,838/1,288,397.76 = 353,261.92/x
  3. Step 3: Cross multiply
    858,838x = 1,288,397.76 × 353,261.92
  4. Step 4: Simplify right side
    858,838x = 455,141,866,421.30
  5. Step 5: Solve for x
    x = 455,141,866,421.30/858,838
  6. Step 6: Final answer
    x = 529,950.78

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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.