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Finding the Fourth Proportional to 309,355.61, 426,922.45 and 173,392.04

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Solution

The fourth proportional to 309,355.61, 426,922.45 and 173,392.04 is: 239,287.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,355.61 : 426,922.45 = 173,392.04 : x
  2. Step 2: Convert to fraction form
    309,355.61/426,922.45 = 173,392.04/x
  3. Step 3: Cross multiply
    309,355.61x = 426,922.45 × 173,392.04
  4. Step 4: Simplify right side
    309,355.61x = 74,024,955,161.12
  5. Step 5: Solve for x
    x = 74,024,955,161.12/309,355.61
  6. Step 6: Final answer
    x = 239,287.58

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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.