Home / 810,378.60-1,215,778.05-430,987.38

Finding the Fourth Proportional to 810,378.60, 1,215,778.05 and 430,987.38

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Solution

The fourth proportional to 810,378.60, 1,215,778.05 and 430,987.38 is: 646,592.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,378.60 : 1,215,778.05 = 430,987.38 : x
  2. Step 2: Convert to fraction form
    810,378.60/1,215,778.05 = 430,987.38/x
  3. Step 3: Cross multiply
    810,378.60x = 1,215,778.05 × 430,987.38
  4. Step 4: Simplify right side
    810,378.60x = 523,984,996,431.01
  5. Step 5: Solve for x
    x = 523,984,996,431.01/810,378.60
  6. Step 6: Final answer
    x = 646,592.84

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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.