Home / 643,426.47-887,929.57-356,946.56

Finding the Fourth Proportional to 643,426.47, 887,929.57 and 356,946.56

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Solution

The fourth proportional to 643,426.47, 887,929.57 and 356,946.56 is: 492,586.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,426.47 : 887,929.57 = 356,946.56 : x
  2. Step 2: Convert to fraction form
    643,426.47/887,929.57 = 356,946.56/x
  3. Step 3: Cross multiply
    643,426.47x = 887,929.57 × 356,946.56
  4. Step 4: Simplify right side
    643,426.47x = 316,943,404,641.41
  5. Step 5: Solve for x
    x = 316,943,404,641.41/643,426.47
  6. Step 6: Final answer
    x = 492,586.83

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1.5x scale

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.