Home / 813,900.90-1,220,851.35-415,769.70

Finding the Fourth Proportional to 813,900.90, 1,220,851.35 and 415,769.70

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Solution

The fourth proportional to 813,900.90, 1,220,851.35 and 415,769.70 is: 623,654.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,900.90 : 1,220,851.35 = 415,769.70 : x
  2. Step 2: Convert to fraction form
    813,900.90/1,220,851.35 = 415,769.70/x
  3. Step 3: Cross multiply
    813,900.90x = 1,220,851.35 × 415,769.70
  4. Step 4: Simplify right side
    813,900.90x = 507,592,999,534.10
  5. Step 5: Solve for x
    x = 507,592,999,534.10/813,900.90
  6. Step 6: Final answer
    x = 623,654.55

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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.