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Finding the Fourth Proportional to 309,398.37, 426,995.87 and 173,430.15

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Solution

The fourth proportional to 309,398.37, 426,995.87 and 173,430.15 is: 239,348.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,398.37 : 426,995.87 = 173,430.15 : x
  2. Step 2: Convert to fraction form
    309,398.37/426,995.87 = 173,430.15/x
  3. Step 3: Cross multiply
    309,398.37x = 426,995.87 × 173,430.15
  4. Step 4: Simplify right side
    309,398.37x = 74,053,956,916.33
  5. Step 5: Solve for x
    x = 74,053,956,916.33/309,398.37
  6. Step 6: Final answer
    x = 239,348.25

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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.