Home / 765,742.91-1,056,685.10-421,511.60

Finding the Fourth Proportional to 765,742.91, 1,056,685.10 and 421,511.60

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Solution

The fourth proportional to 765,742.91, 1,056,685.10 and 421,511.60 is: 581,663.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,742.91 : 1,056,685.10 = 421,511.60 : x
  2. Step 2: Convert to fraction form
    765,742.91/1,056,685.10 = 421,511.60/x
  3. Step 3: Cross multiply
    765,742.91x = 1,056,685.10 × 421,511.60
  4. Step 4: Simplify right side
    765,742.91x = 445,405,027,731.32
  5. Step 5: Solve for x
    x = 445,405,027,731.32/765,742.91
  6. Step 6: Final answer
    x = 581,663.93

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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.