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Finding the Fourth Proportional to 887.50, 1,224.45 and 555.81

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Solution

The fourth proportional to 887.50, 1,224.45 and 555.81 is: 766.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.50 : 1,224.45 = 555.81 : x
  2. Step 2: Convert to fraction form
    887.50/1,224.45 = 555.81/x
  3. Step 3: Cross multiply
    887.50x = 1,224.45 × 555.81
  4. Step 4: Simplify right side
    887.50x = 680,561.55
  5. Step 5: Solve for x
    x = 680,561.55/887.50
  6. Step 6: Final answer
    x = 766.83

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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.