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Finding the Fourth Proportional to 679,420.31, 937,611.95 and 373,509.54

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Solution

The fourth proportional to 679,420.31, 937,611.95 and 373,509.54 is: 515,449.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,420.31 : 937,611.95 = 373,509.54 : x
  2. Step 2: Convert to fraction form
    679,420.31/937,611.95 = 373,509.54/x
  3. Step 3: Cross multiply
    679,420.31x = 937,611.95 × 373,509.54
  4. Step 4: Simplify right side
    679,420.31x = 350,207,006,275.46
  5. Step 5: Solve for x
    x = 350,207,006,275.46/679,420.31
  6. Step 6: Final answer
    x = 515,449.72

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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.