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Finding the Fourth Proportional to 1,569.71, 2,355.19 and 703.42

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Solution

The fourth proportional to 1,569.71, 2,355.19 and 703.42 is: 1,055.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.71 : 2,355.19 = 703.42 : x
  2. Step 2: Convert to fraction form
    1,569.71/2,355.19 = 703.42/x
  3. Step 3: Cross multiply
    1,569.71x = 2,355.19 × 703.42
  4. Step 4: Simplify right side
    1,569.71x = 1,656,680.10
  5. Step 5: Solve for x
    x = 1,656,680.10/1,569.71
  6. Step 6: Final answer
    x = 1,055.40

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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.