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Finding the Fourth Proportional to 478,774.35, 660,499.18 and 315,219.87

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Solution

The fourth proportional to 478,774.35, 660,499.18 and 315,219.87 is: 434,865.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,774.35 : 660,499.18 = 315,219.87 : x
  2. Step 2: Convert to fraction form
    478,774.35/660,499.18 = 315,219.87/x
  3. Step 3: Cross multiply
    478,774.35x = 660,499.18 × 315,219.87
  4. Step 4: Simplify right side
    478,774.35x = 208,202,464,866.66
  5. Step 5: Solve for x
    x = 208,202,464,866.66/478,774.35
  6. Step 6: Final answer
    x = 434,865.54

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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.