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Finding the Fourth Proportional to 289,221.80, 433,541.10 and 131,563.40

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Solution

The fourth proportional to 289,221.80, 433,541.10 and 131,563.40 is: 197,212.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,221.80 : 433,541.10 = 131,563.40 : x
  2. Step 2: Convert to fraction form
    289,221.80/433,541.10 = 131,563.40/x
  3. Step 3: Cross multiply
    289,221.80x = 433,541.10 × 131,563.40
  4. Step 4: Simplify right side
    289,221.80x = 57,038,141,155.74
  5. Step 5: Solve for x
    x = 57,038,141,155.74/289,221.80
  6. Step 6: Final answer
    x = 197,212.45

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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.