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Finding the Fourth Proportional to 30,603.40, 45,905.10 and 30,311.80

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Solution

The fourth proportional to 30,603.40, 45,905.10 and 30,311.80 is: 45,467.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,603.40 : 45,905.10 = 30,311.80 : x
  2. Step 2: Convert to fraction form
    30,603.40/45,905.10 = 30,311.80/x
  3. Step 3: Cross multiply
    30,603.40x = 45,905.10 × 30,311.80
  4. Step 4: Simplify right side
    30,603.40x = 1,391,466,210.18
  5. Step 5: Solve for x
    x = 1,391,466,210.18/30,603.40
  6. Step 6: Final answer
    x = 45,467.70

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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.