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Finding the Fourth Proportional to 309,357.61, 426,925.21 and 173,394.04

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Solution

The fourth proportional to 309,357.61, 426,925.21 and 173,394.04 is: 239,290.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,357.61 : 426,925.21 = 173,394.04 : x
  2. Step 2: Convert to fraction form
    309,357.61/426,925.21 = 173,394.04/x
  3. Step 3: Cross multiply
    309,357.61x = 426,925.21 × 173,394.04
  4. Step 4: Simplify right side
    309,357.61x = 74,026,286,939.75
  5. Step 5: Solve for x
    x = 74,026,286,939.75/309,357.61
  6. Step 6: Final answer
    x = 239,290.34

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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.