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Finding the Fourth Proportional to 983.34, 1,356.48 and 651.69

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Solution

The fourth proportional to 983.34, 1,356.48 and 651.69 is: 898.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.34 : 1,356.48 = 651.69 : x
  2. Step 2: Convert to fraction form
    983.34/1,356.48 = 651.69/x
  3. Step 3: Cross multiply
    983.34x = 1,356.48 × 651.69
  4. Step 4: Simplify right side
    983.34x = 884,004.45
  5. Step 5: Solve for x
    x = 884,004.45/983.34
  6. Step 6: Final answer
    x = 898.98

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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.