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Finding the Fourth Proportional to 319,703.60, 478,864.20 and 284,682.80

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Solution

The fourth proportional to 319,703.60, 478,864.20 and 284,682.80 is: 426,408.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,703.60 : 478,864.20 = 284,682.80 : x
  2. Step 2: Convert to fraction form
    319,703.60/478,864.20 = 284,682.80/x
  3. Step 3: Cross multiply
    319,703.60x = 478,864.20 × 284,682.80
  4. Step 4: Simplify right side
    319,703.60x = 136,324,401,275.76
  5. Step 5: Solve for x
    x = 136,324,401,275.76/319,703.60
  6. Step 6: Final answer
    x = 426,408.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.