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Finding the Fourth Proportional to 648,156.80, 972,235.20 and 490,692.80

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Solution

The fourth proportional to 648,156.80, 972,235.20 and 490,692.80 is: 736,039.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,156.80 : 972,235.20 = 490,692.80 : x
  2. Step 2: Convert to fraction form
    648,156.80/972,235.20 = 490,692.80/x
  3. Step 3: Cross multiply
    648,156.80x = 972,235.20 × 490,692.80
  4. Step 4: Simplify right side
    648,156.80x = 477,068,812,546.56
  5. Step 5: Solve for x
    x = 477,068,812,546.56/648,156.80
  6. Step 6: Final answer
    x = 736,039.20

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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.