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Finding the Fourth Proportional to 389,991.70, 584,987.55 and 222,030.10

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Solution

The fourth proportional to 389,991.70, 584,987.55 and 222,030.10 is: 333,045.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,991.70 : 584,987.55 = 222,030.10 : x
  2. Step 2: Convert to fraction form
    389,991.70/584,987.55 = 222,030.10/x
  3. Step 3: Cross multiply
    389,991.70x = 584,987.55 × 222,030.10
  4. Step 4: Simplify right side
    389,991.70x = 129,884,844,225.26
  5. Step 5: Solve for x
    x = 129,884,844,225.26/389,991.70
  6. Step 6: Final answer
    x = 333,045.15

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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.