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Finding the Fourth Proportional to 1,678.96, 2,317.16 and 970.88

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Solution

The fourth proportional to 1,678.96, 2,317.16 and 970.88 is: 1,339.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.96 : 2,317.16 = 970.88 : x
  2. Step 2: Convert to fraction form
    1,678.96/2,317.16 = 970.88/x
  3. Step 3: Cross multiply
    1,678.96x = 2,317.16 × 970.88
  4. Step 4: Simplify right side
    1,678.96x = 2,249,684.30
  5. Step 5: Solve for x
    x = 2,249,684.30/1,678.96
  6. Step 6: Final answer
    x = 1,339.93

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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.