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Finding the Fourth Proportional to 865.69, 1,194.65 and 555.19

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Solution

The fourth proportional to 865.69, 1,194.65 and 555.19 is: 766.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.69 : 1,194.65 = 555.19 : x
  2. Step 2: Convert to fraction form
    865.69/1,194.65 = 555.19/x
  3. Step 3: Cross multiply
    865.69x = 1,194.65 × 555.19
  4. Step 4: Simplify right side
    865.69x = 663,254.05
  5. Step 5: Solve for x
    x = 663,254.05/865.69
  6. Step 6: Final answer
    x = 766.16

Related Problems

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Half scale
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Double scale
Find fourth proportional to 866.69, 1,196.03 and 556.19
Similar ratio
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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.