Home / 728,748.43-1,005,674.23-406,479.40

Finding the Fourth Proportional to 728,748.43, 1,005,674.23 and 406,479.40

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Solution

The fourth proportional to 728,748.43, 1,005,674.23 and 406,479.40 is: 560,942.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,748.43 : 1,005,674.23 = 406,479.40 : x
  2. Step 2: Convert to fraction form
    728,748.43/1,005,674.23 = 406,479.40/x
  3. Step 3: Cross multiply
    728,748.43x = 1,005,674.23 × 406,479.40
  4. Step 4: Simplify right side
    728,748.43x = 408,785,855,599.78
  5. Step 5: Solve for x
    x = 408,785,855,599.78/728,748.43
  6. Step 6: Final answer
    x = 560,942.35

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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.