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Finding the Fourth Proportional to 626,671.28, 864,916.81 and 354,754.64

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Solution

The fourth proportional to 626,671.28, 864,916.81 and 354,754.64 is: 489,623.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,671.28 : 864,916.81 = 354,754.64 : x
  2. Step 2: Convert to fraction form
    626,671.28/864,916.81 = 354,754.64/x
  3. Step 3: Cross multiply
    626,671.28x = 864,916.81 × 354,754.64
  4. Step 4: Simplify right side
    626,671.28x = 306,833,251,561.50
  5. Step 5: Solve for x
    x = 306,833,251,561.50/626,671.28
  6. Step 6: Final answer
    x = 489,623.92

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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.