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Finding the Fourth Proportional to 1,569.03, 2,165.30 and 870.51

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Solution

The fourth proportional to 1,569.03, 2,165.30 and 870.51 is: 1,201.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.03 : 2,165.30 = 870.51 : x
  2. Step 2: Convert to fraction form
    1,569.03/2,165.30 = 870.51/x
  3. Step 3: Cross multiply
    1,569.03x = 2,165.30 × 870.51
  4. Step 4: Simplify right side
    1,569.03x = 1,884,910.95
  5. Step 5: Solve for x
    x = 1,884,910.95/1,569.03
  6. Step 6: Final answer
    x = 1,201.32

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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.