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Finding the Fourth Proportional to 551,266.61, 825,694.33 and 390,856.31

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Solution

The fourth proportional to 551,266.61, 825,694.33 and 390,856.31 is: 585,429.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,266.61 : 825,694.33 = 390,856.31 : x
  2. Step 2: Convert to fraction form
    551,266.61/825,694.33 = 390,856.31/x
  3. Step 3: Cross multiply
    551,266.61x = 825,694.33 × 390,856.31
  4. Step 4: Simplify right side
    551,266.61x = 322,727,839,011.72
  5. Step 5: Solve for x
    x = 322,727,839,011.72/551,266.61
  6. Step 6: Final answer
    x = 585,429.69

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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.