Home / 393,416,955.50-542,963,006.20-223,912,405.84

Finding the Fourth Proportional to 393,416,955.50, 542,963,006.20 and 223,912,405.84

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Solution

The fourth proportional to 393,416,955.50, 542,963,006.20 and 223,912,405.84 is: 309,026,215.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,416,955.50 : 542,963,006.20 = 223,912,405.84 : x
  2. Step 2: Convert to fraction form
    393,416,955.50/542,963,006.20 = 223,912,405.84/x
  3. Step 3: Cross multiply
    393,416,955.50x = 542,963,006.20 × 223,912,405.84
  4. Step 4: Simplify right side
    393,416,955.50x = 121,576,152,999,801,056
  5. Step 5: Solve for x
    x = 121,576,152,999,801,056/393,416,955.50
  6. Step 6: Final answer
    x = 309,026,215.83

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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.