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Finding the Fourth Proportional to 643,258.26, 887,802.66 and 356,870.61

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Solution

The fourth proportional to 643,258.26, 887,802.66 and 356,870.61 is: 492,540.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,258.26 : 887,802.66 = 356,870.61 : x
  2. Step 2: Convert to fraction form
    643,258.26/887,802.66 = 356,870.61/x
  3. Step 3: Cross multiply
    643,258.26x = 887,802.66 × 356,870.61
  4. Step 4: Simplify right side
    643,258.26x = 316,830,676,833.82
  5. Step 5: Solve for x
    x = 316,830,676,833.82/643,258.26
  6. Step 6: Final answer
    x = 492,540.39

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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.