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Finding the Fourth Proportional to 877.63, 1,211.14 and 567.67

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Solution

The fourth proportional to 877.63, 1,211.14 and 567.67 is: 783.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.63 : 1,211.14 = 567.67 : x
  2. Step 2: Convert to fraction form
    877.63/1,211.14 = 567.67/x
  3. Step 3: Cross multiply
    877.63x = 1,211.14 × 567.67
  4. Step 4: Simplify right side
    877.63x = 687,527.84
  5. Step 5: Solve for x
    x = 687,527.84/877.63
  6. Step 6: Final answer
    x = 783.39

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Double scale
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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.