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Finding the Fourth Proportional to 1,353.84, 1,864.80 and 1,263.12

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Solution

The fourth proportional to 1,353.84, 1,864.80 and 1,263.12 is: 1,739.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.84 : 1,864.80 = 1,263.12 : x
  2. Step 2: Convert to fraction form
    1,353.84/1,864.80 = 1,263.12/x
  3. Step 3: Cross multiply
    1,353.84x = 1,864.80 × 1,263.12
  4. Step 4: Simplify right side
    1,353.84x = 2,355,466.18
  5. Step 5: Solve for x
    x = 2,355,466.18/1,353.84
  6. Step 6: Final answer
    x = 1,739.84

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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.