Home / 914,689.56-1,262,710.38-642,990.36

Finding the Fourth Proportional to 914,689.56, 1,262,710.38 and 642,990.36

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Solution

The fourth proportional to 914,689.56, 1,262,710.38 and 642,990.36 is: 887,635.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    914,689.56 : 1,262,710.38 = 642,990.36 : x
  2. Step 2: Convert to fraction form
    914,689.56/1,262,710.38 = 642,990.36/x
  3. Step 3: Cross multiply
    914,689.56x = 1,262,710.38 × 642,990.36
  4. Step 4: Simplify right side
    914,689.56x = 811,910,601,811.94
  5. Step 5: Solve for x
    x = 811,910,601,811.94/914,689.56
  6. Step 6: Final answer
    x = 887,635.15

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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.