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Finding the Fourth Proportional to 873.99, 1,307.75 and 627.21

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Solution

The fourth proportional to 873.99, 1,307.75 and 627.21 is: 938.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.99 : 1,307.75 = 627.21 : x
  2. Step 2: Convert to fraction form
    873.99/1,307.75 = 627.21/x
  3. Step 3: Cross multiply
    873.99x = 1,307.75 × 627.21
  4. Step 4: Simplify right side
    873.99x = 820,230.74
  5. Step 5: Solve for x
    x = 820,230.74/873.99
  6. Step 6: Final answer
    x = 938.49

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Double scale
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1.5x scale

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.