Home / 643,426.84-887,930.09-356,946.93

Finding the Fourth Proportional to 643,426.84, 887,930.09 and 356,946.93

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Solution

The fourth proportional to 643,426.84, 887,930.09 and 356,946.93 is: 492,587.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,426.84 : 887,930.09 = 356,946.93 : x
  2. Step 2: Convert to fraction form
    643,426.84/887,930.09 = 356,946.93/x
  3. Step 3: Cross multiply
    643,426.84x = 887,930.09 × 356,946.93
  4. Step 4: Simplify right side
    643,426.84x = 316,943,919,680.12
  5. Step 5: Solve for x
    x = 316,943,919,680.12/643,426.84
  6. Step 6: Final answer
    x = 492,587.35

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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.