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Finding the Fourth Proportional to 1,047.40, 1,567.86 and 785.96

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Solution

The fourth proportional to 1,047.40, 1,567.86 and 785.96 is: 1,176.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.40 : 1,567.86 = 785.96 : x
  2. Step 2: Convert to fraction form
    1,047.40/1,567.86 = 785.96/x
  3. Step 3: Cross multiply
    1,047.40x = 1,567.86 × 785.96
  4. Step 4: Simplify right side
    1,047.40x = 1,232,275.25
  5. Step 5: Solve for x
    x = 1,232,275.25/1,047.40
  6. Step 6: Final answer
    x = 1,176.51

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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.