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Finding the Fourth Proportional to 734.77, 1,013.92 and 419.88

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Solution

The fourth proportional to 734.77, 1,013.92 and 419.88 is: 579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.77 : 1,013.92 = 419.88 : x
  2. Step 2: Convert to fraction form
    734.77/1,013.92 = 419.88/x
  3. Step 3: Cross multiply
    734.77x = 1,013.92 × 419.88
  4. Step 4: Simplify right side
    734.77x = 425,727.48
  5. Step 5: Solve for x
    x = 425,727.48/734.77
  6. Step 6: Final answer
    x = 579.40

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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.