Home / 392,985.18-542,290.41-223,186.50

Finding the Fourth Proportional to 392,985.18, 542,290.41 and 223,186.50

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Solution

The fourth proportional to 392,985.18, 542,290.41 and 223,186.50 is: 307,980.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,985.18 : 542,290.41 = 223,186.50 : x
  2. Step 2: Convert to fraction form
    392,985.18/542,290.41 = 223,186.50/x
  3. Step 3: Cross multiply
    392,985.18x = 542,290.41 × 223,186.50
  4. Step 4: Simplify right side
    392,985.18x = 121,031,898,591.47
  5. Step 5: Solve for x
    x = 121,031,898,591.47/392,985.18
  6. Step 6: Final answer
    x = 307,980.82

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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.