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Finding the Fourth Proportional to 647,740.80, 893,879.35 and 357,344.46

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Solution

The fourth proportional to 647,740.80, 893,879.35 and 357,344.46 is: 493,133.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,740.80 : 893,879.35 = 357,344.46 : x
  2. Step 2: Convert to fraction form
    647,740.80/893,879.35 = 357,344.46/x
  3. Step 3: Cross multiply
    647,740.80x = 893,879.35 × 357,344.46
  4. Step 4: Simplify right side
    647,740.80x = 319,422,832,737.54
  5. Step 5: Solve for x
    x = 319,422,832,737.54/647,740.80
  6. Step 6: Final answer
    x = 493,133.72

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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.