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Finding the Fourth Proportional to 988.94, 1,482.71 and 433.37

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Solution

The fourth proportional to 988.94, 1,482.71 and 433.37 is: 649.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.94 : 1,482.71 = 433.37 : x
  2. Step 2: Convert to fraction form
    988.94/1,482.71 = 433.37/x
  3. Step 3: Cross multiply
    988.94x = 1,482.71 × 433.37
  4. Step 4: Simplify right side
    988.94x = 642,566.82
  5. Step 5: Solve for x
    x = 642,566.82/988.94
  6. Step 6: Final answer
    x = 649.76

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.