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Finding the Fourth Proportional to 518,979.40, 715,555.32 and 426,776.56

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Solution

The fourth proportional to 518,979.40, 715,555.32 and 426,776.56 is: 588,428.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,979.40 : 715,555.32 = 426,776.56 : x
  2. Step 2: Convert to fraction form
    518,979.40/715,555.32 = 426,776.56/x
  3. Step 3: Cross multiply
    518,979.40x = 715,555.32 × 426,776.56
  4. Step 4: Simplify right side
    518,979.40x = 305,382,237,959.30
  5. Step 5: Solve for x
    x = 305,382,237,959.30/518,979.40
  6. Step 6: Final answer
    x = 588,428.44

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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.