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Finding the Fourth Proportional to 290,836.74, 436,264.83 and 80,457.06

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Solution

The fourth proportional to 290,836.74, 436,264.83 and 80,457.06 is: 120,688.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,836.74 : 436,264.83 = 80,457.06 : x
  2. Step 2: Convert to fraction form
    290,836.74/436,264.83 = 80,457.06/x
  3. Step 3: Cross multiply
    290,836.74x = 436,264.83 × 80,457.06
  4. Step 4: Simplify right side
    290,836.74x = 35,100,585,603.20
  5. Step 5: Solve for x
    x = 35,100,585,603.20/290,836.74
  6. Step 6: Final answer
    x = 120,688.28

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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.