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Finding the Fourth Proportional to 664,364.60, 996,692.70 and 215,106.20

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Solution

The fourth proportional to 664,364.60, 996,692.70 and 215,106.20 is: 322,706.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,364.60 : 996,692.70 = 215,106.20 : x
  2. Step 2: Convert to fraction form
    664,364.60/996,692.70 = 215,106.20/x
  3. Step 3: Cross multiply
    664,364.60x = 996,692.70 × 215,106.20
  4. Step 4: Simplify right side
    664,364.60x = 214,394,779,264.74
  5. Step 5: Solve for x
    x = 214,394,779,264.74/664,364.60
  6. Step 6: Final answer
    x = 322,706.51

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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.