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Finding the Fourth Proportional to 402,505.91, 555,226.87 and 251,340.47

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Solution

The fourth proportional to 402,505.91, 555,226.87 and 251,340.47 is: 346,705.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,505.91 : 555,226.87 = 251,340.47 : x
  2. Step 2: Convert to fraction form
    402,505.91/555,226.87 = 251,340.47/x
  3. Step 3: Cross multiply
    402,505.91x = 555,226.87 × 251,340.47
  4. Step 4: Simplify right side
    402,505.91x = 139,550,980,550.97
  5. Step 5: Solve for x
    x = 139,550,980,550.97/402,505.91
  6. Step 6: Final answer
    x = 346,705.42

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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.