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Finding the Fourth Proportional to 1,034.75, 1,428.05 and 569.09

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Solution

The fourth proportional to 1,034.75, 1,428.05 and 569.09 is: 785.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.75 : 1,428.05 = 569.09 : x
  2. Step 2: Convert to fraction form
    1,034.75/1,428.05 = 569.09/x
  3. Step 3: Cross multiply
    1,034.75x = 1,428.05 × 569.09
  4. Step 4: Simplify right side
    1,034.75x = 812,688.97
  5. Step 5: Solve for x
    x = 812,688.97/1,034.75
  6. Step 6: Final answer
    x = 785.40

Related Problems

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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.