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Finding the Fourth Proportional to 908.89, 1,253.98 and 530.77

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Solution

The fourth proportional to 908.89, 1,253.98 and 530.77 is: 732.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.89 : 1,253.98 = 530.77 : x
  2. Step 2: Convert to fraction form
    908.89/1,253.98 = 530.77/x
  3. Step 3: Cross multiply
    908.89x = 1,253.98 × 530.77
  4. Step 4: Simplify right side
    908.89x = 665,574.96
  5. Step 5: Solve for x
    x = 665,574.96/908.89
  6. Step 6: Final answer
    x = 732.29

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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.