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Finding the Fourth Proportional to 1,585.56, 2,378.30 and 707.84

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Solution

The fourth proportional to 1,585.56, 2,378.30 and 707.84 is: 1,061.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.56 : 2,378.30 = 707.84 : x
  2. Step 2: Convert to fraction form
    1,585.56/2,378.30 = 707.84/x
  3. Step 3: Cross multiply
    1,585.56x = 2,378.30 × 707.84
  4. Step 4: Simplify right side
    1,585.56x = 1,683,455.87
  5. Step 5: Solve for x
    x = 1,683,455.87/1,585.56
  6. Step 6: Final answer
    x = 1,061.74

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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.