Home / 810,014.40-1,215,021.60-660,423.60

Finding the Fourth Proportional to 810,014.40, 1,215,021.60 and 660,423.60

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Solution

The fourth proportional to 810,014.40, 1,215,021.60 and 660,423.60 is: 990,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,014.40 : 1,215,021.60 = 660,423.60 : x
  2. Step 2: Convert to fraction form
    810,014.40/1,215,021.60 = 660,423.60/x
  3. Step 3: Cross multiply
    810,014.40x = 1,215,021.60 × 660,423.60
  4. Step 4: Simplify right side
    810,014.40x = 802,428,939,149.76
  5. Step 5: Solve for x
    x = 802,428,939,149.76/810,014.40
  6. Step 6: Final answer
    x = 990,635.40

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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.