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Finding the Fourth Proportional to 291,457.80, 402,221.70 and 170,610.36

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Solution

The fourth proportional to 291,457.80, 402,221.70 and 170,610.36 is: 235,448.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,457.80 : 402,221.70 = 170,610.36 : x
  2. Step 2: Convert to fraction form
    291,457.80/402,221.70 = 170,610.36/x
  3. Step 3: Cross multiply
    291,457.80x = 402,221.70 × 170,610.36
  4. Step 4: Simplify right side
    291,457.80x = 68,623,189,036.81
  5. Step 5: Solve for x
    x = 68,623,189,036.81/291,457.80
  6. Step 6: Final answer
    x = 235,448.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.