Home / 1,282.18-1,769.50-715.08

Finding the Fourth Proportional to 1,282.18, 1,769.50 and 715.08

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Solution

The fourth proportional to 1,282.18, 1,769.50 and 715.08 is: 986.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.18 : 1,769.50 = 715.08 : x
  2. Step 2: Convert to fraction form
    1,282.18/1,769.50 = 715.08/x
  3. Step 3: Cross multiply
    1,282.18x = 1,769.50 × 715.08
  4. Step 4: Simplify right side
    1,282.18x = 1,265,330.48
  5. Step 5: Solve for x
    x = 1,265,330.48/1,282.18
  6. Step 6: Final answer
    x = 986.86

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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.