Home / 740.12-1,110.74-278.35

Finding the Fourth Proportional to 740.12, 1,110.74 and 278.35

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Solution

The fourth proportional to 740.12, 1,110.74 and 278.35 is: 417.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.12 : 1,110.74 = 278.35 : x
  2. Step 2: Convert to fraction form
    740.12/1,110.74 = 278.35/x
  3. Step 3: Cross multiply
    740.12x = 1,110.74 × 278.35
  4. Step 4: Simplify right side
    740.12x = 309,174.48
  5. Step 5: Solve for x
    x = 309,174.48/740.12
  6. Step 6: Final answer
    x = 417.74

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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.