Home / 765,513.42-1,145,461.76-638,840.96

Finding the Fourth Proportional to 765,513.42, 1,145,461.76 and 638,840.96

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Solution

The fourth proportional to 765,513.42, 1,145,461.76 and 638,840.96 is: 955,917.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,513.42 : 1,145,461.76 = 638,840.96 : x
  2. Step 2: Convert to fraction form
    765,513.42/1,145,461.76 = 638,840.96/x
  3. Step 3: Cross multiply
    765,513.42x = 1,145,461.76 × 638,840.96
  4. Step 4: Simplify right side
    765,513.42x = 731,767,887,207.49
  5. Step 5: Solve for x
    x = 731,767,887,207.49/765,513.42
  6. Step 6: Final answer
    x = 955,917.78

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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.