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Finding the Fourth Proportional to 1,510.49, 2,084.07 and 920.61

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Solution

The fourth proportional to 1,510.49, 2,084.07 and 920.61 is: 1,270.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,510.49 : 2,084.07 = 920.61 : x
  2. Step 2: Convert to fraction form
    1,510.49/2,084.07 = 920.61/x
  3. Step 3: Cross multiply
    1,510.49x = 2,084.07 × 920.61
  4. Step 4: Simplify right side
    1,510.49x = 1,918,615.68
  5. Step 5: Solve for x
    x = 1,918,615.68/1,510.49
  6. Step 6: Final answer
    x = 1,270.19

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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.