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Finding the Fourth Proportional to 630,761.80, 870,731.22 and 427,108.36

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Solution

The fourth proportional to 630,761.80, 870,731.22 and 427,108.36 is: 589,599.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,761.80 : 870,731.22 = 427,108.36 : x
  2. Step 2: Convert to fraction form
    630,761.80/870,731.22 = 427,108.36/x
  3. Step 3: Cross multiply
    630,761.80x = 870,731.22 × 427,108.36
  4. Step 4: Simplify right side
    630,761.80x = 371,896,583,375.00
  5. Step 5: Solve for x
    x = 371,896,583,375.00/630,761.80
  6. Step 6: Final answer
    x = 589,599.09

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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.