Home / 392,986.18-542,291.79-223,187.50

Finding the Fourth Proportional to 392,986.18, 542,291.79 and 223,187.50

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Solution

The fourth proportional to 392,986.18, 542,291.79 and 223,187.50 is: 307,982.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,986.18 : 542,291.79 = 223,187.50 : x
  2. Step 2: Convert to fraction form
    392,986.18/542,291.79 = 223,187.50/x
  3. Step 3: Cross multiply
    392,986.18x = 542,291.79 × 223,187.50
  4. Step 4: Simplify right side
    392,986.18x = 121,032,748,880.63
  5. Step 5: Solve for x
    x = 121,032,748,880.63/392,986.18
  6. Step 6: Final answer
    x = 307,982.20

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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.