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Finding the Fourth Proportional to 720,953.32, 994,864.24 and 398,604.12

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Solution

The fourth proportional to 720,953.32, 994,864.24 and 398,604.12 is: 550,045.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,953.32 : 994,864.24 = 398,604.12 : x
  2. Step 2: Convert to fraction form
    720,953.32/994,864.24 = 398,604.12/x
  3. Step 3: Cross multiply
    720,953.32x = 994,864.24 × 398,604.12
  4. Step 4: Simplify right side
    720,953.32x = 396,556,984,904.67
  5. Step 5: Solve for x
    x = 396,556,984,904.67/720,953.32
  6. Step 6: Final answer
    x = 550,045.30

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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.