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Finding the Fourth Proportional to 660,576.60, 990,864.90 and 548,480.70

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Solution

The fourth proportional to 660,576.60, 990,864.90 and 548,480.70 is: 822,721.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,576.60 : 990,864.90 = 548,480.70 : x
  2. Step 2: Convert to fraction form
    660,576.60/990,864.90 = 548,480.70/x
  3. Step 3: Cross multiply
    660,576.60x = 990,864.90 × 548,480.70
  4. Step 4: Simplify right side
    660,576.60x = 543,470,273,957.43
  5. Step 5: Solve for x
    x = 543,470,273,957.43/660,576.60
  6. Step 6: Final answer
    x = 822,721.05

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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.