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Finding the Fourth Proportional to 1,055.70, 1,583.55 and 275.65

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Solution

The fourth proportional to 1,055.70, 1,583.55 and 275.65 is: 413.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.70 : 1,583.55 = 275.65 : x
  2. Step 2: Convert to fraction form
    1,055.70/1,583.55 = 275.65/x
  3. Step 3: Cross multiply
    1,055.70x = 1,583.55 × 275.65
  4. Step 4: Simplify right side
    1,055.70x = 436,505.56
  5. Step 5: Solve for x
    x = 436,505.56/1,055.70
  6. Step 6: Final answer
    x = 413.48

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.