Home / 765,478.25-1,056,179.76-643,434.54

Finding the Fourth Proportional to 765,478.25, 1,056,179.76 and 643,434.54

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Solution

The fourth proportional to 765,478.25, 1,056,179.76 and 643,434.54 is: 887,788.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,478.25 : 1,056,179.76 = 643,434.54 : x
  2. Step 2: Convert to fraction form
    765,478.25/1,056,179.76 = 643,434.54/x
  3. Step 3: Cross multiply
    765,478.25x = 1,056,179.76 × 643,434.54
  4. Step 4: Simplify right side
    765,478.25x = 679,582,531,659.36
  5. Step 5: Solve for x
    x = 679,582,531,659.36/765,478.25
  6. Step 6: Final answer
    x = 887,788.17

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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.