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Finding the Fourth Proportional to 1,130.56, 1,550.04 and 1,128.74

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Solution

The fourth proportional to 1,130.56, 1,550.04 and 1,128.74 is: 1,547.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.56 : 1,550.04 = 1,128.74 : x
  2. Step 2: Convert to fraction form
    1,130.56/1,550.04 = 1,128.74/x
  3. Step 3: Cross multiply
    1,130.56x = 1,550.04 × 1,128.74
  4. Step 4: Simplify right side
    1,130.56x = 1,749,580.17
  5. Step 5: Solve for x
    x = 1,749,580.17/1,130.56
  6. Step 6: Final answer
    x = 1,547.54

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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 (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.