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Finding the Fourth Proportional to 509,616.30, 764,424.45 and 478,512.30

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Solution

The fourth proportional to 509,616.30, 764,424.45 and 478,512.30 is: 717,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,616.30 : 764,424.45 = 478,512.30 : x
  2. Step 2: Convert to fraction form
    509,616.30/764,424.45 = 478,512.30/x
  3. Step 3: Cross multiply
    509,616.30x = 764,424.45 × 478,512.30
  4. Step 4: Simplify right side
    509,616.30x = 365,786,501,745.74
  5. Step 5: Solve for x
    x = 365,786,501,745.74/509,616.30
  6. Step 6: Final answer
    x = 717,768.45

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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.