Home / 1,278.98-1,918.83-457.32

Finding the Fourth Proportional to 1,278.98, 1,918.83 and 457.32

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Solution

The fourth proportional to 1,278.98, 1,918.83 and 457.32 is: 686.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.98 : 1,918.83 = 457.32 : x
  2. Step 2: Convert to fraction form
    1,278.98/1,918.83 = 457.32/x
  3. Step 3: Cross multiply
    1,278.98x = 1,918.83 × 457.32
  4. Step 4: Simplify right side
    1,278.98x = 877,519.34
  5. Step 5: Solve for x
    x = 877,519.34/1,278.98
  6. Step 6: Final answer
    x = 686.11

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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.