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Finding the Fourth Proportional to 290,457.41, 435,686.46 and 90,778.84

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Solution

The fourth proportional to 290,457.41, 435,686.46 and 90,778.84 is: 136,168.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,457.41 : 435,686.46 = 90,778.84 : x
  2. Step 2: Convert to fraction form
    290,457.41/435,686.46 = 90,778.84/x
  3. Step 3: Cross multiply
    290,457.41x = 435,686.46 × 90,778.84
  4. Step 4: Simplify right side
    290,457.41x = 39,551,112,463.61
  5. Step 5: Solve for x
    x = 39,551,112,463.61/290,457.41
  6. Step 6: Final answer
    x = 136,168.37

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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.