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Finding the Fourth Proportional to 1,569.61, 2,166.24 and 906.64

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Solution

The fourth proportional to 1,569.61, 2,166.24 and 906.64 is: 1,251.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.61 : 2,166.24 = 906.64 : x
  2. Step 2: Convert to fraction form
    1,569.61/2,166.24 = 906.64/x
  3. Step 3: Cross multiply
    1,569.61x = 2,166.24 × 906.64
  4. Step 4: Simplify right side
    1,569.61x = 1,963,999.83
  5. Step 5: Solve for x
    x = 1,963,999.83/1,569.61
  6. Step 6: Final answer
    x = 1,251.27

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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.