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Finding the Fourth Proportional to 519,612.80, 780,002.40 and 401,806.40

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Solution

The fourth proportional to 519,612.80, 780,002.40 and 401,806.40 is: 603,160.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,612.80 : 780,002.40 = 401,806.40 : x
  2. Step 2: Convert to fraction form
    519,612.80/780,002.40 = 401,806.40/x
  3. Step 3: Cross multiply
    519,612.80x = 780,002.40 × 401,806.40
  4. Step 4: Simplify right side
    519,612.80x = 313,409,956,335.36
  5. Step 5: Solve for x
    x = 313,409,956,335.36/519,612.80
  6. Step 6: Final answer
    x = 603,160.58

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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.