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Finding the Fourth Proportional to 370,647.09, 555,970.64 and 90,161.91

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Solution

The fourth proportional to 370,647.09, 555,970.64 and 90,161.91 is: 135,242.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,647.09 : 555,970.64 = 90,161.91 : x
  2. Step 2: Convert to fraction form
    370,647.09/555,970.64 = 90,161.91/x
  3. Step 3: Cross multiply
    370,647.09x = 555,970.64 × 90,161.91
  4. Step 4: Simplify right side
    370,647.09x = 50,127,374,355.51
  5. Step 5: Solve for x
    x = 50,127,374,355.51/370,647.09
  6. Step 6: Final answer
    x = 135,242.87

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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.