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Finding the Fourth Proportional to 1,130.23, 1,559.06 and 815.14

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Solution

The fourth proportional to 1,130.23, 1,559.06 and 815.14 is: 1,124.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.23 : 1,559.06 = 815.14 : x
  2. Step 2: Convert to fraction form
    1,130.23/1,559.06 = 815.14/x
  3. Step 3: Cross multiply
    1,130.23x = 1,559.06 × 815.14
  4. Step 4: Simplify right side
    1,130.23x = 1,270,844.37
  5. Step 5: Solve for x
    x = 1,270,844.37/1,130.23
  6. Step 6: Final answer
    x = 1,124.42

Related Problems

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Half scale
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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.