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Finding the Fourth Proportional to 1,307.34, 1,804.14 and 717.87

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Solution

The fourth proportional to 1,307.34, 1,804.14 and 717.87 is: 990.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.34 : 1,804.14 = 717.87 : x
  2. Step 2: Convert to fraction form
    1,307.34/1,804.14 = 717.87/x
  3. Step 3: Cross multiply
    1,307.34x = 1,804.14 × 717.87
  4. Step 4: Simplify right side
    1,307.34x = 1,295,137.98
  5. Step 5: Solve for x
    x = 1,295,137.98/1,307.34
  6. Step 6: Final answer
    x = 990.67

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Half scale
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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.