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Finding the Fourth Proportional to 478,493.68, 660,336.25 and 274,581.94

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Solution

The fourth proportional to 478,493.68, 660,336.25 and 274,581.94 is: 378,931.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,493.68 : 660,336.25 = 274,581.94 : x
  2. Step 2: Convert to fraction form
    478,493.68/660,336.25 = 274,581.94/x
  3. Step 3: Cross multiply
    478,493.68x = 660,336.25 × 274,581.94
  4. Step 4: Simplify right side
    478,493.68x = 181,316,408,577.33
  5. Step 5: Solve for x
    x = 181,316,408,577.33/478,493.68
  6. Step 6: Final answer
    x = 378,931.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.