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Finding the Fourth Proportional to 1,547.69, 2,135.70 and 884.57

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Solution

The fourth proportional to 1,547.69, 2,135.70 and 884.57 is: 1,220.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.69 : 2,135.70 = 884.57 : x
  2. Step 2: Convert to fraction form
    1,547.69/2,135.70 = 884.57/x
  3. Step 3: Cross multiply
    1,547.69x = 2,135.70 × 884.57
  4. Step 4: Simplify right side
    1,547.69x = 1,889,165.47
  5. Step 5: Solve for x
    x = 1,889,165.47/1,547.69
  6. Step 6: Final answer
    x = 1,220.64

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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.