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Finding the Fourth Proportional to 289,325.10, 433,987.65 and 243,705.90

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Solution

The fourth proportional to 289,325.10, 433,987.65 and 243,705.90 is: 365,558.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,325.10 : 433,987.65 = 243,705.90 : x
  2. Step 2: Convert to fraction form
    289,325.10/433,987.65 = 243,705.90/x
  3. Step 3: Cross multiply
    289,325.10x = 433,987.65 × 243,705.90
  4. Step 4: Simplify right side
    289,325.10x = 105,765,350,832.14
  5. Step 5: Solve for x
    x = 105,765,350,832.14/289,325.10
  6. Step 6: Final answer
    x = 365,558.85

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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.