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Finding the Fourth Proportional to 1,358.67, 1,875.35 and 917.63

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Solution

The fourth proportional to 1,358.67, 1,875.35 and 917.63 is: 1,266.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.67 : 1,875.35 = 917.63 : x
  2. Step 2: Convert to fraction form
    1,358.67/1,875.35 = 917.63/x
  3. Step 3: Cross multiply
    1,358.67x = 1,875.35 × 917.63
  4. Step 4: Simplify right side
    1,358.67x = 1,720,877.37
  5. Step 5: Solve for x
    x = 1,720,877.37/1,358.67
  6. Step 6: Final answer
    x = 1,266.59

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1.5x scale

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.