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Finding the Fourth Proportional to 676,735.71, 933,833.18 and 390,200.44

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Solution

The fourth proportional to 676,735.71, 933,833.18 and 390,200.44 is: 538,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,735.71 : 933,833.18 = 390,200.44 : x
  2. Step 2: Convert to fraction form
    676,735.71/933,833.18 = 390,200.44/x
  3. Step 3: Cross multiply
    676,735.71x = 933,833.18 × 390,200.44
  4. Step 4: Simplify right side
    676,735.71x = 364,382,117,017.02
  5. Step 5: Solve for x
    x = 364,382,117,017.02/676,735.71
  6. Step 6: Final answer
    x = 538,440.80

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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.