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Finding the Fourth Proportional to 910.16, 1,256.04 and 511.83

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Solution

The fourth proportional to 910.16, 1,256.04 and 511.83 is: 706.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.16 : 1,256.04 = 511.83 : x
  2. Step 2: Convert to fraction form
    910.16/1,256.04 = 511.83/x
  3. Step 3: Cross multiply
    910.16x = 1,256.04 × 511.83
  4. Step 4: Simplify right side
    910.16x = 642,878.95
  5. Step 5: Solve for x
    x = 642,878.95/910.16
  6. Step 6: Final answer
    x = 706.34

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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.