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Finding the Fourth Proportional to 1,686.15, 2,530.17 and 957.15

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Solution

The fourth proportional to 1,686.15, 2,530.17 and 957.15 is: 1,436.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.15 : 2,530.17 = 957.15 : x
  2. Step 2: Convert to fraction form
    1,686.15/2,530.17 = 957.15/x
  3. Step 3: Cross multiply
    1,686.15x = 2,530.17 × 957.15
  4. Step 4: Simplify right side
    1,686.15x = 2,421,752.22
  5. Step 5: Solve for x
    x = 2,421,752.22/1,686.15
  6. Step 6: Final answer
    x = 1,436.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.