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Finding the Fourth Proportional to 734.30, 1,012.28 and 646.16

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Solution

The fourth proportional to 734.30, 1,012.28 and 646.16 is: 890.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.30 : 1,012.28 = 646.16 : x
  2. Step 2: Convert to fraction form
    734.30/1,012.28 = 646.16/x
  3. Step 3: Cross multiply
    734.30x = 1,012.28 × 646.16
  4. Step 4: Simplify right side
    734.30x = 654,094.84
  5. Step 5: Solve for x
    x = 654,094.84/734.30
  6. Step 6: Final answer
    x = 890.77

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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.