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Finding the Fourth Proportional to 522,049.50, 720,775.80 and 400,974.75

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Solution

The fourth proportional to 522,049.50, 720,775.80 and 400,974.75 is: 553,612.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,049.50 : 720,775.80 = 400,974.75 : x
  2. Step 2: Convert to fraction form
    522,049.50/720,775.80 = 400,974.75/x
  3. Step 3: Cross multiply
    522,049.50x = 720,775.80 × 400,974.75
  4. Step 4: Simplify right side
    522,049.50x = 289,012,896,211.05
  5. Step 5: Solve for x
    x = 289,012,896,211.05/522,049.50
  6. Step 6: Final answer
    x = 553,612.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.