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Finding the Fourth Proportional to 992.98, 1,489.20 and 603.10

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Solution

The fourth proportional to 992.98, 1,489.20 and 603.10 is: 904.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.98 : 1,489.20 = 603.10 : x
  2. Step 2: Convert to fraction form
    992.98/1,489.20 = 603.10/x
  3. Step 3: Cross multiply
    992.98x = 1,489.20 × 603.10
  4. Step 4: Simplify right side
    992.98x = 898,136.52
  5. Step 5: Solve for x
    x = 898,136.52/992.98
  6. Step 6: Final answer
    x = 904.49

Related Problems

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Half scale
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Double scale
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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.