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Finding the Fourth Proportional to 288,999.70, 433,499.55 and 155,811.40

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Solution

The fourth proportional to 288,999.70, 433,499.55 and 155,811.40 is: 233,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,999.70 : 433,499.55 = 155,811.40 : x
  2. Step 2: Convert to fraction form
    288,999.70/433,499.55 = 155,811.40/x
  3. Step 3: Cross multiply
    288,999.70x = 433,499.55 × 155,811.40
  4. Step 4: Simplify right side
    288,999.70x = 67,544,171,784.87
  5. Step 5: Solve for x
    x = 67,544,171,784.87/288,999.70
  6. Step 6: Final answer
    x = 233,717.10

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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.