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Finding the Fourth Proportional to 478,775.85, 660,501.24 and 315,221.37

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Solution

The fourth proportional to 478,775.85, 660,501.24 and 315,221.37 is: 434,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,775.85 : 660,501.24 = 315,221.37 : x
  2. Step 2: Convert to fraction form
    478,775.85/660,501.24 = 315,221.37/x
  3. Step 3: Cross multiply
    478,775.85x = 660,501.24 × 315,221.37
  4. Step 4: Simplify right side
    478,775.85x = 208,204,105,759.50
  5. Step 5: Solve for x
    x = 208,204,105,759.50/478,775.85
  6. Step 6: Final answer
    x = 434,867.60

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1.5x scale

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.