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Finding the Fourth Proportional to 426,293.32, 639,301.54 and 141,907.48

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Solution

The fourth proportional to 426,293.32, 639,301.54 and 141,907.48 is: 212,815.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,293.32 : 639,301.54 = 141,907.48 : x
  2. Step 2: Convert to fraction form
    426,293.32/639,301.54 = 141,907.48/x
  3. Step 3: Cross multiply
    426,293.32x = 639,301.54 × 141,907.48
  4. Step 4: Simplify right side
    426,293.32x = 90,721,670,501.52
  5. Step 5: Solve for x
    x = 90,721,670,501.52/426,293.32
  6. Step 6: Final answer
    x = 212,815.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.