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Finding the Fourth Proportional to 1,547.78, 2,135.94 and 884.76

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Solution

The fourth proportional to 1,547.78, 2,135.94 and 884.76 is: 1,220.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.78 : 2,135.94 = 884.76 : x
  2. Step 2: Convert to fraction form
    1,547.78/2,135.94 = 884.76/x
  3. Step 3: Cross multiply
    1,547.78x = 2,135.94 × 884.76
  4. Step 4: Simplify right side
    1,547.78x = 1,889,794.27
  5. Step 5: Solve for x
    x = 1,889,794.27/1,547.78
  6. Step 6: Final answer
    x = 1,220.97

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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.