Home / 643,924.20-965,886.30-494,916.60

Finding the Fourth Proportional to 643,924.20, 965,886.30 and 494,916.60

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Solution

The fourth proportional to 643,924.20, 965,886.30 and 494,916.60 is: 742,374.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,924.20 : 965,886.30 = 494,916.60 : x
  2. Step 2: Convert to fraction form
    643,924.20/965,886.30 = 494,916.60/x
  3. Step 3: Cross multiply
    643,924.20x = 965,886.30 × 494,916.60
  4. Step 4: Simplify right side
    643,924.20x = 478,033,163,582.58
  5. Step 5: Solve for x
    x = 478,033,163,582.58/643,924.20
  6. Step 6: Final answer
    x = 742,374.90

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.