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Finding the Fourth Proportional to 521,955.55, 720,130.26 and 307,148.41

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Solution

The fourth proportional to 521,955.55, 720,130.26 and 307,148.41 is: 423,765.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,955.55 : 720,130.26 = 307,148.41 : x
  2. Step 2: Convert to fraction form
    521,955.55/720,130.26 = 307,148.41/x
  3. Step 3: Cross multiply
    521,955.55x = 720,130.26 × 307,148.41
  4. Step 4: Simplify right side
    521,955.55x = 221,186,864,351.89
  5. Step 5: Solve for x
    x = 221,186,864,351.89/521,955.55
  6. Step 6: Final answer
    x = 423,765.71

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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.