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Finding the Fourth Proportional to 851.19, 1,174.80 and 555.94

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Solution

The fourth proportional to 851.19, 1,174.80 and 555.94 is: 767.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.19 : 1,174.80 = 555.94 : x
  2. Step 2: Convert to fraction form
    851.19/1,174.80 = 555.94/x
  3. Step 3: Cross multiply
    851.19x = 1,174.80 × 555.94
  4. Step 4: Simplify right side
    851.19x = 653,118.31
  5. Step 5: Solve for x
    x = 653,118.31/851.19
  6. Step 6: Final answer
    x = 767.30

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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.