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Finding the Fourth Proportional to 1,307.08, 1,803.67 and 717.50

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Solution

The fourth proportional to 1,307.08, 1,803.67 and 717.50 is: 990.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.08 : 1,803.67 = 717.50 : x
  2. Step 2: Convert to fraction form
    1,307.08/1,803.67 = 717.50/x
  3. Step 3: Cross multiply
    1,307.08x = 1,803.67 × 717.50
  4. Step 4: Simplify right side
    1,307.08x = 1,294,120.62
  5. Step 5: Solve for x
    x = 1,294,120.62/1,307.08
  6. Step 6: Final answer
    x = 990.09

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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.