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Finding the Fourth Proportional to 309,344.88, 426,931.32 and 173,415.52

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Solution

The fourth proportional to 309,344.88, 426,931.32 and 173,415.52 is: 239,333.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,344.88 : 426,931.32 = 173,415.52 : x
  2. Step 2: Convert to fraction form
    309,344.88/426,931.32 = 173,415.52/x
  3. Step 3: Cross multiply
    309,344.88x = 426,931.32 × 173,415.52
  4. Step 4: Simplify right side
    309,344.88x = 74,036,516,862.09
  5. Step 5: Solve for x
    x = 74,036,516,862.09/309,344.88
  6. Step 6: Final answer
    x = 239,333.25

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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.