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Finding the Fourth Proportional to 393,053.96, 542,428.98 and 223,316.84

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Solution

The fourth proportional to 393,053.96, 542,428.98 and 223,316.84 is: 308,185.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,053.96 : 542,428.98 = 223,316.84 : x
  2. Step 2: Convert to fraction form
    393,053.96/542,428.98 = 223,316.84/x
  3. Step 3: Cross multiply
    393,053.96x = 542,428.98 × 223,316.84
  4. Step 4: Simplify right side
    393,053.96x = 121,133,525,738.02
  5. Step 5: Solve for x
    x = 121,133,525,738.02/393,053.96
  6. Step 6: Final answer
    x = 308,185.49

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1.5x scale

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.