Home / 988,872.60-1,483,308.90-420,106.80

Finding the Fourth Proportional to 988,872.60, 1,483,308.90 and 420,106.80

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Solution

The fourth proportional to 988,872.60, 1,483,308.90 and 420,106.80 is: 630,160.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,872.60 : 1,483,308.90 = 420,106.80 : x
  2. Step 2: Convert to fraction form
    988,872.60/1,483,308.90 = 420,106.80/x
  3. Step 3: Cross multiply
    988,872.60x = 1,483,308.90 × 420,106.80
  4. Step 4: Simplify right side
    988,872.60x = 623,148,155,390.52
  5. Step 5: Solve for x
    x = 623,148,155,390.52/988,872.60
  6. Step 6: Final answer
    x = 630,160.20

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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.