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Finding the Fourth Proportional to 662,416.80, 993,625.20 and 330,640.80

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Solution

The fourth proportional to 662,416.80, 993,625.20 and 330,640.80 is: 495,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,416.80 : 993,625.20 = 330,640.80 : x
  2. Step 2: Convert to fraction form
    662,416.80/993,625.20 = 330,640.80/x
  3. Step 3: Cross multiply
    662,416.80x = 993,625.20 × 330,640.80
  4. Step 4: Simplify right side
    662,416.80x = 328,533,031,028.16
  5. Step 5: Solve for x
    x = 328,533,031,028.16/662,416.80
  6. Step 6: Final answer
    x = 495,961.20

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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.