Home / 991,275-1,487,660.28-459,169.36

Finding the Fourth Proportional to 991,275, 1,487,660.28 and 459,169.36

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Solution

The fourth proportional to 991,275, 1,487,660.28 and 459,169.36 is: 689,100.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,275 : 1,487,660.28 = 459,169.36 : x
  2. Step 2: Convert to fraction form
    991,275/1,487,660.28 = 459,169.36/x
  3. Step 3: Cross multiply
    991,275x = 1,487,660.28 × 459,169.36
  4. Step 4: Simplify right side
    991,275x = 683,088,018,665.02
  5. Step 5: Solve for x
    x = 683,088,018,665.02/991,275
  6. Step 6: Final answer
    x = 689,100.42

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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.