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Finding the Fourth Proportional to 478,912.75, 660,904.76 and 261,119.64

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Solution

The fourth proportional to 478,912.75, 660,904.76 and 261,119.64 is: 360,347.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,912.75 : 660,904.76 = 261,119.64 : x
  2. Step 2: Convert to fraction form
    478,912.75/660,904.76 = 261,119.64/x
  3. Step 3: Cross multiply
    478,912.75x = 660,904.76 × 261,119.64
  4. Step 4: Simplify right side
    478,912.75x = 172,575,209,653.69
  5. Step 5: Solve for x
    x = 172,575,209,653.69/478,912.75
  6. Step 6: Final answer
    x = 360,347.91

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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.