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Finding the Fourth Proportional to 1,298.62, 1,947.93 and 433

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Solution

The fourth proportional to 1,298.62, 1,947.93 and 433 is: 649.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.62 : 1,947.93 = 433 : x
  2. Step 2: Convert to fraction form
    1,298.62/1,947.93 = 433/x
  3. Step 3: Cross multiply
    1,298.62x = 1,947.93 × 433
  4. Step 4: Simplify right side
    1,298.62x = 843,453.69
  5. Step 5: Solve for x
    x = 843,453.69/1,298.62
  6. Step 6: Final answer
    x = 649.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,299.62, 1,949.43 and 434
Similar ratio
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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.