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Finding the Fourth Proportional to 630,990.91, 870,843.86 and 359,124.94

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Solution

The fourth proportional to 630,990.91, 870,843.86 and 359,124.94 is: 495,635.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,990.91 : 870,843.86 = 359,124.94 : x
  2. Step 2: Convert to fraction form
    630,990.91/870,843.86 = 359,124.94/x
  3. Step 3: Cross multiply
    630,990.91x = 870,843.86 × 359,124.94
  4. Step 4: Simplify right side
    630,990.91x = 312,741,748,971.87
  5. Step 5: Solve for x
    x = 312,741,748,971.87/630,990.91
  6. Step 6: Final answer
    x = 495,635.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.