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Finding the Fourth Proportional to 586,117.65, 878,171.06 and 393,631.28

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Solution

The fourth proportional to 586,117.65, 878,171.06 and 393,631.28 is: 589,771.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,117.65 : 878,171.06 = 393,631.28 : x
  2. Step 2: Convert to fraction form
    586,117.65/878,171.06 = 393,631.28/x
  3. Step 3: Cross multiply
    586,117.65x = 878,171.06 × 393,631.28
  4. Step 4: Simplify right side
    586,117.65x = 345,675,598,406.76
  5. Step 5: Solve for x
    x = 345,675,598,406.76/586,117.65
  6. Step 6: Final answer
    x = 589,771.69

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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.