Home / 1,678.34-2,518.43-705.13

Finding the Fourth Proportional to 1,678.34, 2,518.43 and 705.13

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Solution

The fourth proportional to 1,678.34, 2,518.43 and 705.13 is: 1,058.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.34 : 2,518.43 = 705.13 : x
  2. Step 2: Convert to fraction form
    1,678.34/2,518.43 = 705.13/x
  3. Step 3: Cross multiply
    1,678.34x = 2,518.43 × 705.13
  4. Step 4: Simplify right side
    1,678.34x = 1,775,810.72
  5. Step 5: Solve for x
    x = 1,775,810.72/1,678.34
  6. Step 6: Final answer
    x = 1,058.07

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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.