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Finding the Fourth Proportional to 647,593.71, 893,685.15 and 357,216.45

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Solution

The fourth proportional to 647,593.71, 893,685.15 and 357,216.45 is: 492,961.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,593.71 : 893,685.15 = 357,216.45 : x
  2. Step 2: Convert to fraction form
    647,593.71/893,685.15 = 357,216.45/x
  3. Step 3: Cross multiply
    647,593.71x = 893,685.15 × 357,216.45
  4. Step 4: Simplify right side
    647,593.71x = 319,239,036,700.72
  5. Step 5: Solve for x
    x = 319,239,036,700.72/647,593.71
  6. Step 6: Final answer
    x = 492,961.92

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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.