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Finding the Fourth Proportional to 603,715.20, 905,572.80 and 288,009.60

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Solution

The fourth proportional to 603,715.20, 905,572.80 and 288,009.60 is: 432,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,715.20 : 905,572.80 = 288,009.60 : x
  2. Step 2: Convert to fraction form
    603,715.20/905,572.80 = 288,009.60/x
  3. Step 3: Cross multiply
    603,715.20x = 905,572.80 × 288,009.60
  4. Step 4: Simplify right side
    603,715.20x = 260,813,659,898.88
  5. Step 5: Solve for x
    x = 260,813,659,898.88/603,715.20
  6. Step 6: Final answer
    x = 432,014.40

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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.