Home / 1,278.92-1,918.98-457.82

Finding the Fourth Proportional to 1,278.92, 1,918.98 and 457.82

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Solution

The fourth proportional to 1,278.92, 1,918.98 and 457.82 is: 686.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.92 : 1,918.98 = 457.82 : x
  2. Step 2: Convert to fraction form
    1,278.92/1,918.98 = 457.82/x
  3. Step 3: Cross multiply
    1,278.92x = 1,918.98 × 457.82
  4. Step 4: Simplify right side
    1,278.92x = 878,547.42
  5. Step 5: Solve for x
    x = 878,547.42/1,278.92
  6. Step 6: Final answer
    x = 686.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.