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Finding the Fourth Proportional to 680,656.61, 939,288.95 and 374,729.93

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Solution

The fourth proportional to 680,656.61, 939,288.95 and 374,729.93 is: 517,117.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,656.61 : 939,288.95 = 374,729.93 : x
  2. Step 2: Convert to fraction form
    680,656.61/939,288.95 = 374,729.93/x
  3. Step 3: Cross multiply
    680,656.61x = 939,288.95 × 374,729.93
  4. Step 4: Simplify right side
    680,656.61x = 351,979,682,483.27
  5. Step 5: Solve for x
    x = 351,979,682,483.27/680,656.61
  6. Step 6: Final answer
    x = 517,117.85

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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.