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Finding the Fourth Proportional to 985.02, 1,475.58 and 573.28

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Solution

The fourth proportional to 985.02, 1,475.58 and 573.28 is: 858.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.02 : 1,475.58 = 573.28 : x
  2. Step 2: Convert to fraction form
    985.02/1,475.58 = 573.28/x
  3. Step 3: Cross multiply
    985.02x = 1,475.58 × 573.28
  4. Step 4: Simplify right side
    985.02x = 845,920.50
  5. Step 5: Solve for x
    x = 845,920.50/985.02
  6. Step 6: Final answer
    x = 858.79

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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.