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Finding the Fourth Proportional to 630,990.96, 870,786.75 and 359,097.96

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Solution

The fourth proportional to 630,990.96, 870,786.75 and 359,097.96 is: 495,566.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,990.96 : 870,786.75 = 359,097.96 : x
  2. Step 2: Convert to fraction form
    630,990.96/870,786.75 = 359,097.96/x
  3. Step 3: Cross multiply
    630,990.96x = 870,786.75 × 359,097.96
  4. Step 4: Simplify right side
    630,990.96x = 312,697,745,520.03
  5. Step 5: Solve for x
    x = 312,697,745,520.03/630,990.96
  6. Step 6: Final answer
    x = 495,566.13

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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.