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Finding the Fourth Proportional to 1,358.89, 2,038.62 and 709.45

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Solution

The fourth proportional to 1,358.89, 2,038.62 and 709.45 is: 1,064.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.89 : 2,038.62 = 709.45 : x
  2. Step 2: Convert to fraction form
    1,358.89/2,038.62 = 709.45/x
  3. Step 3: Cross multiply
    1,358.89x = 2,038.62 × 709.45
  4. Step 4: Simplify right side
    1,358.89x = 1,446,298.96
  5. Step 5: Solve for x
    x = 1,446,298.96/1,358.89
  6. Step 6: Final answer
    x = 1,064.32

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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.