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Finding the Fourth Proportional to 914.77, 1,259.85 and 790.39

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Solution

The fourth proportional to 914.77, 1,259.85 and 790.39 is: 1,088.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.77 : 1,259.85 = 790.39 : x
  2. Step 2: Convert to fraction form
    914.77/1,259.85 = 790.39/x
  3. Step 3: Cross multiply
    914.77x = 1,259.85 × 790.39
  4. Step 4: Simplify right side
    914.77x = 995,772.84
  5. Step 5: Solve for x
    x = 995,772.84/914.77
  6. Step 6: Final answer
    x = 1,088.55

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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.