Home / 918,109.50-1,265,655.79-641,608.91

Finding the Fourth Proportional to 918,109.50, 1,265,655.79 and 641,608.91

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Solution

The fourth proportional to 918,109.50, 1,265,655.79 and 641,608.91 is: 884,487.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,109.50 : 1,265,655.79 = 641,608.91 : x
  2. Step 2: Convert to fraction form
    918,109.50/1,265,655.79 = 641,608.91/x
  3. Step 3: Cross multiply
    918,109.50x = 1,265,655.79 × 641,608.91
  4. Step 4: Simplify right side
    918,109.50x = 812,056,028,671.00
  5. Step 5: Solve for x
    x = 812,056,028,671.00/918,109.50
  6. Step 6: Final answer
    x = 884,487.12

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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.