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Finding the Fourth Proportional to 855.70, 1,283.55 and 564.10

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Solution

The fourth proportional to 855.70, 1,283.55 and 564.10 is: 846.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.70 : 1,283.55 = 564.10 : x
  2. Step 2: Convert to fraction form
    855.70/1,283.55 = 564.10/x
  3. Step 3: Cross multiply
    855.70x = 1,283.55 × 564.10
  4. Step 4: Simplify right side
    855.70x = 724,050.56
  5. Step 5: Solve for x
    x = 724,050.56/855.70
  6. Step 6: Final answer
    x = 846.15

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Double scale
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1.5x scale

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.