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Finding the Fourth Proportional to 395,030.61, 545,213.21 and 223,001.01

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Solution

The fourth proportional to 395,030.61, 545,213.21 and 223,001.01 is: 307,781.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,030.61 : 545,213.21 = 223,001.01 : x
  2. Step 2: Convert to fraction form
    395,030.61/545,213.21 = 223,001.01/x
  3. Step 3: Cross multiply
    395,030.61x = 545,213.21 × 223,001.01
  4. Step 4: Simplify right side
    395,030.61x = 121,583,095,380.34
  5. Step 5: Solve for x
    x = 121,583,095,380.34/395,030.61
  6. Step 6: Final answer
    x = 307,781.45

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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.