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Finding the Fourth Proportional to 658,003.40, 987,005.10 and 303,709.40

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Solution

The fourth proportional to 658,003.40, 987,005.10 and 303,709.40 is: 455,564.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,003.40 : 987,005.10 = 303,709.40 : x
  2. Step 2: Convert to fraction form
    658,003.40/987,005.10 = 303,709.40/x
  3. Step 3: Cross multiply
    658,003.40x = 987,005.10 × 303,709.40
  4. Step 4: Simplify right side
    658,003.40x = 299,762,726,717.94
  5. Step 5: Solve for x
    x = 299,762,726,717.94/658,003.40
  6. Step 6: Final answer
    x = 455,564.10

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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.