Home / 765,665.96-1,056,600.38-421,499.09

Finding the Fourth Proportional to 765,665.96, 1,056,600.38 and 421,499.09

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Solution

The fourth proportional to 765,665.96, 1,056,600.38 and 421,499.09 is: 581,658.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,665.96 : 1,056,600.38 = 421,499.09 : x
  2. Step 2: Convert to fraction form
    765,665.96/1,056,600.38 = 421,499.09/x
  3. Step 3: Cross multiply
    765,665.96x = 1,056,600.38 × 421,499.09
  4. Step 4: Simplify right side
    765,665.96x = 445,356,102,358.90
  5. Step 5: Solve for x
    x = 445,356,102,358.90/765,665.96
  6. Step 6: Final answer
    x = 581,658.49

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1.5x scale

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.