Home / 643,426.72-887,929.91-356,946.80

Finding the Fourth Proportional to 643,426.72, 887,929.91 and 356,946.80

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Solution

The fourth proportional to 643,426.72, 887,929.91 and 356,946.80 is: 492,587.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,426.72 : 887,929.91 = 356,946.80 : x
  2. Step 2: Convert to fraction form
    643,426.72/887,929.91 = 356,946.80/x
  3. Step 3: Cross multiply
    643,426.72x = 887,929.91 × 356,946.80
  4. Step 4: Simplify right side
    643,426.72x = 316,943,739,998.79
  5. Step 5: Solve for x
    x = 316,943,739,998.79/643,426.72
  6. Step 6: Final answer
    x = 492,587.16

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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.