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Finding the Fourth Proportional to 954.78, 1,316.76 and 622.98

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Solution

The fourth proportional to 954.78, 1,316.76 and 622.98 is: 859.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.78 : 1,316.76 = 622.98 : x
  2. Step 2: Convert to fraction form
    954.78/1,316.76 = 622.98/x
  3. Step 3: Cross multiply
    954.78x = 1,316.76 × 622.98
  4. Step 4: Simplify right side
    954.78x = 820,315.14
  5. Step 5: Solve for x
    x = 820,315.14/954.78
  6. Step 6: Final answer
    x = 859.17

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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.