Home / 847.03-1,168.95-515.40

Finding the Fourth Proportional to 847.03, 1,168.95 and 515.40

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Solution

The fourth proportional to 847.03, 1,168.95 and 515.40 is: 711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.03 : 1,168.95 = 515.40 : x
  2. Step 2: Convert to fraction form
    847.03/1,168.95 = 515.40/x
  3. Step 3: Cross multiply
    847.03x = 1,168.95 × 515.40
  4. Step 4: Simplify right side
    847.03x = 602,476.83
  5. Step 5: Solve for x
    x = 602,476.83/847.03
  6. Step 6: Final answer
    x = 711.28

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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.