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Finding the Fourth Proportional to 738.02, 1,012.54 and 718.86

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Solution

The fourth proportional to 738.02, 1,012.54 and 718.86 is: 986.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.02 : 1,012.54 = 718.86 : x
  2. Step 2: Convert to fraction form
    738.02/1,012.54 = 718.86/x
  3. Step 3: Cross multiply
    738.02x = 1,012.54 × 718.86
  4. Step 4: Simplify right side
    738.02x = 727,874.50
  5. Step 5: Solve for x
    x = 727,874.50/738.02
  6. Step 6: Final answer
    x = 986.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.