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Finding the Fourth Proportional to 445,904.20, 668,856.30 and 400,803.40

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Solution

The fourth proportional to 445,904.20, 668,856.30 and 400,803.40 is: 601,205.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,904.20 : 668,856.30 = 400,803.40 : x
  2. Step 2: Convert to fraction form
    445,904.20/668,856.30 = 400,803.40/x
  3. Step 3: Cross multiply
    445,904.20x = 668,856.30 × 400,803.40
  4. Step 4: Simplify right side
    445,904.20x = 268,079,879,151.42
  5. Step 5: Solve for x
    x = 268,079,879,151.42/445,904.20
  6. Step 6: Final answer
    x = 601,205.10

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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.