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Finding the Fourth Proportional to 289,043.70, 433,565.55 and 155,855.40

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Solution

The fourth proportional to 289,043.70, 433,565.55 and 155,855.40 is: 233,783.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,043.70 : 433,565.55 = 155,855.40 : x
  2. Step 2: Convert to fraction form
    289,043.70/433,565.55 = 155,855.40/x
  3. Step 3: Cross multiply
    289,043.70x = 433,565.55 × 155,855.40
  4. Step 4: Simplify right side
    289,043.70x = 67,573,532,221.47
  5. Step 5: Solve for x
    x = 67,573,532,221.47/289,043.70
  6. Step 6: Final answer
    x = 233,783.10

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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.