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Finding the Fourth Proportional to 478,658.86, 660,661.79 and 297,507.60

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Solution

The fourth proportional to 478,658.86, 660,661.79 and 297,507.60 is: 410,630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,658.86 : 660,661.79 = 297,507.60 : x
  2. Step 2: Convert to fraction form
    478,658.86/660,661.79 = 297,507.60/x
  3. Step 3: Cross multiply
    478,658.86x = 660,661.79 × 297,507.60
  4. Step 4: Simplify right side
    478,658.86x = 196,551,902,067.07
  5. Step 5: Solve for x
    x = 196,551,902,067.07/478,658.86
  6. Step 6: Final answer
    x = 410,630.45

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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.