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Finding the Fourth Proportional to 954.69, 1,316.99 and 561.48

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Solution

The fourth proportional to 954.69, 1,316.99 and 561.48 is: 774.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.69 : 1,316.99 = 561.48 : x
  2. Step 2: Convert to fraction form
    954.69/1,316.99 = 561.48/x
  3. Step 3: Cross multiply
    954.69x = 1,316.99 × 561.48
  4. Step 4: Simplify right side
    954.69x = 739,460.74
  5. Step 5: Solve for x
    x = 739,460.74/954.69
  6. Step 6: Final answer
    x = 774.56

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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.