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Finding the Fourth Proportional to 1,686.42, 2,326.10 and 1,547

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Solution

The fourth proportional to 1,686.42, 2,326.10 and 1,547 is: 2,133.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.42 : 2,326.10 = 1,547 : x
  2. Step 2: Convert to fraction form
    1,686.42/2,326.10 = 1,547/x
  3. Step 3: Cross multiply
    1,686.42x = 2,326.10 × 1,547
  4. Step 4: Simplify right side
    1,686.42x = 3,598,476.70
  5. Step 5: Solve for x
    x = 3,598,476.70/1,686.42
  6. Step 6: Final answer
    x = 2,133.80

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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.