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Finding the Fourth Proportional to 643,507.18, 888,040.02 and 357,026.58

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Solution

The fourth proportional to 643,507.18, 888,040.02 and 357,026.58 is: 492,696.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,507.18 : 888,040.02 = 357,026.58 : x
  2. Step 2: Convert to fraction form
    643,507.18/888,040.02 = 357,026.58/x
  3. Step 3: Cross multiply
    643,507.18x = 888,040.02 × 357,026.58
  4. Step 4: Simplify right side
    643,507.18x = 317,053,889,458.60
  5. Step 5: Solve for x
    x = 317,053,889,458.60/643,507.18
  6. Step 6: Final answer
    x = 492,696.74

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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.