Home / 805,404.60-1,208,106.90-385,500.60

Finding the Fourth Proportional to 805,404.60, 1,208,106.90 and 385,500.60

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Solution

The fourth proportional to 805,404.60, 1,208,106.90 and 385,500.60 is: 578,250.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,404.60 : 1,208,106.90 = 385,500.60 : x
  2. Step 2: Convert to fraction form
    805,404.60/1,208,106.90 = 385,500.60/x
  3. Step 3: Cross multiply
    805,404.60x = 1,208,106.90 × 385,500.60
  4. Step 4: Simplify right side
    805,404.60x = 465,725,934,814.14
  5. Step 5: Solve for x
    x = 465,725,934,814.14/805,404.60
  6. Step 6: Final answer
    x = 578,250.90

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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.