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Finding the Fourth Proportional to 910.57, 1,256.58 and 496.57

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Solution

The fourth proportional to 910.57, 1,256.58 and 496.57 is: 685.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.57 : 1,256.58 = 496.57 : x
  2. Step 2: Convert to fraction form
    910.57/1,256.58 = 496.57/x
  3. Step 3: Cross multiply
    910.57x = 1,256.58 × 496.57
  4. Step 4: Simplify right side
    910.57x = 623,971.16
  5. Step 5: Solve for x
    x = 623,971.16/910.57
  6. Step 6: Final answer
    x = 685.26

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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.