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Finding the Fourth Proportional to 1,764.40, 2,434.64 and 1,018.40

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Solution

The fourth proportional to 1,764.40, 2,434.64 and 1,018.40 is: 1,405.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.40 : 2,434.64 = 1,018.40 : x
  2. Step 2: Convert to fraction form
    1,764.40/2,434.64 = 1,018.40/x
  3. Step 3: Cross multiply
    1,764.40x = 2,434.64 × 1,018.40
  4. Step 4: Simplify right side
    1,764.40x = 2,479,437.38
  5. Step 5: Solve for x
    x = 2,479,437.38/1,764.40
  6. Step 6: Final answer
    x = 1,405.26

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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.