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Finding the Fourth Proportional to 900.95, 1,243.12 and 569.19

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Solution

The fourth proportional to 900.95, 1,243.12 and 569.19 is: 785.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.95 : 1,243.12 = 569.19 : x
  2. Step 2: Convert to fraction form
    900.95/1,243.12 = 569.19/x
  3. Step 3: Cross multiply
    900.95x = 1,243.12 × 569.19
  4. Step 4: Simplify right side
    900.95x = 707,571.47
  5. Step 5: Solve for x
    x = 707,571.47/900.95
  6. Step 6: Final answer
    x = 785.36

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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.