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Finding the Fourth Proportional to 660,211.48, 990,317.22 and 360,528.58

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Solution

The fourth proportional to 660,211.48, 990,317.22 and 360,528.58 is: 540,792.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,211.48 : 990,317.22 = 360,528.58 : x
  2. Step 2: Convert to fraction form
    660,211.48/990,317.22 = 360,528.58/x
  3. Step 3: Cross multiply
    660,211.48x = 990,317.22 × 360,528.58
  4. Step 4: Simplify right side
    660,211.48x = 357,037,661,076.15
  5. Step 5: Solve for x
    x = 357,037,661,076.15/660,211.48
  6. Step 6: Final answer
    x = 540,792.87

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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.