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Finding the Fourth Proportional to 713.13, 983.79 and 555.50

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Solution

The fourth proportional to 713.13, 983.79 and 555.50 is: 766.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.13 : 983.79 = 555.50 : x
  2. Step 2: Convert to fraction form
    713.13/983.79 = 555.50/x
  3. Step 3: Cross multiply
    713.13x = 983.79 × 555.50
  4. Step 4: Simplify right side
    713.13x = 546,490.43
  5. Step 5: Solve for x
    x = 546,490.43/713.13
  6. Step 6: Final answer
    x = 766.33

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1.5x scale

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.