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Finding the Fourth Proportional to 561,777.60, 840,916.80 and 324,415.20

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Solution

The fourth proportional to 561,777.60, 840,916.80 and 324,415.20 is: 485,612.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,777.60 : 840,916.80 = 324,415.20 : x
  2. Step 2: Convert to fraction form
    561,777.60/840,916.80 = 324,415.20/x
  3. Step 3: Cross multiply
    561,777.60x = 840,916.80 × 324,415.20
  4. Step 4: Simplify right side
    561,777.60x = 272,806,191,855.36
  5. Step 5: Solve for x
    x = 272,806,191,855.36/561,777.60
  6. Step 6: Final answer
    x = 485,612.44

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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.