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Finding the Fourth Proportional to 611,578.10, 917,367.15 and 572,212.10

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Solution

The fourth proportional to 611,578.10, 917,367.15 and 572,212.10 is: 858,318.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,578.10 : 917,367.15 = 572,212.10 : x
  2. Step 2: Convert to fraction form
    611,578.10/917,367.15 = 572,212.10/x
  3. Step 3: Cross multiply
    611,578.10x = 917,367.15 × 572,212.10
  4. Step 4: Simplify right side
    611,578.10x = 524,928,583,372.52
  5. Step 5: Solve for x
    x = 524,928,583,372.52/611,578.10
  6. Step 6: Final answer
    x = 858,318.15

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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.