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Finding the Fourth Proportional to 402,352.65, 555,015.78 and 251,187.21

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Solution

The fourth proportional to 402,352.65, 555,015.78 and 251,187.21 is: 346,494.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,352.65 : 555,015.78 = 251,187.21 : x
  2. Step 2: Convert to fraction form
    402,352.65/555,015.78 = 251,187.21/x
  3. Step 3: Cross multiply
    402,352.65x = 555,015.78 × 251,187.21
  4. Step 4: Simplify right side
    402,352.65x = 139,412,865,284.17
  5. Step 5: Solve for x
    x = 139,412,865,284.17/402,352.65
  6. Step 6: Final answer
    x = 346,494.21

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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.