Home / 765,857.40-1,056,874.26-421,686.15

Finding the Fourth Proportional to 765,857.40, 1,056,874.26 and 421,686.15

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Solution

The fourth proportional to 765,857.40, 1,056,874.26 and 421,686.15 is: 581,921.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,857.40 : 1,056,874.26 = 421,686.15 : x
  2. Step 2: Convert to fraction form
    765,857.40/1,056,874.26 = 421,686.15/x
  3. Step 3: Cross multiply
    765,857.40x = 1,056,874.26 × 421,686.15
  4. Step 4: Simplify right side
    765,857.40x = 445,669,237,733.50
  5. Step 5: Solve for x
    x = 445,669,237,733.50/765,857.40
  6. Step 6: Final answer
    x = 581,921.96

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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.