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Finding the Fourth Proportional to 664,578.90, 996,868.35 and 310,284.90

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Solution

The fourth proportional to 664,578.90, 996,868.35 and 310,284.90 is: 465,427.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,578.90 : 996,868.35 = 310,284.90 : x
  2. Step 2: Convert to fraction form
    664,578.90/996,868.35 = 310,284.90/x
  3. Step 3: Cross multiply
    664,578.90x = 996,868.35 × 310,284.90
  4. Step 4: Simplify right side
    664,578.90x = 309,313,196,292.92
  5. Step 5: Solve for x
    x = 309,313,196,292.92/664,578.90
  6. Step 6: Final answer
    x = 465,427.35

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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.