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Finding the Fourth Proportional to 1,510.79, 2,084.89 and 847.65

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Solution

The fourth proportional to 1,510.79, 2,084.89 and 847.65 is: 1,169.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,510.79 : 2,084.89 = 847.65 : x
  2. Step 2: Convert to fraction form
    1,510.79/2,084.89 = 847.65/x
  3. Step 3: Cross multiply
    1,510.79x = 2,084.89 × 847.65
  4. Step 4: Simplify right side
    1,510.79x = 1,767,252.57
  5. Step 5: Solve for x
    x = 1,767,252.57/1,510.79
  6. Step 6: Final answer
    x = 1,169.75

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Double scale
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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.