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Finding the Fourth Proportional to 309,329.68, 426,904.92 and 173,386.72

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Solution

The fourth proportional to 309,329.68, 426,904.92 and 173,386.72 is: 239,290.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,329.68 : 426,904.92 = 173,386.72 : x
  2. Step 2: Convert to fraction form
    309,329.68/426,904.92 = 173,386.72/x
  3. Step 3: Cross multiply
    309,329.68x = 426,904.92 × 173,386.72
  4. Step 4: Simplify right side
    309,329.68x = 74,019,643,830.66
  5. Step 5: Solve for x
    x = 74,019,643,830.66/309,329.68
  6. Step 6: Final answer
    x = 239,290.47

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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.