Home / 920,064.80-1,380,140.40-288,999.20

Finding the Fourth Proportional to 920,064.80, 1,380,140.40 and 288,999.20

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Solution

The fourth proportional to 920,064.80, 1,380,140.40 and 288,999.20 is: 433,512.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,064.80 : 1,380,140.40 = 288,999.20 : x
  2. Step 2: Convert to fraction form
    920,064.80/1,380,140.40 = 288,999.20/x
  3. Step 3: Cross multiply
    920,064.80x = 1,380,140.40 × 288,999.20
  4. Step 4: Simplify right side
    920,064.80x = 398,859,471,487.68
  5. Step 5: Solve for x
    x = 398,859,471,487.68/920,064.80
  6. Step 6: Final answer
    x = 433,512.37

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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.