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Finding the Fourth Proportional to 309,315.36, 426,835 and 181,966.36

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Solution

The fourth proportional to 309,315.36, 426,835 and 181,966.36 is: 251,101.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,315.36 : 426,835 = 181,966.36 : x
  2. Step 2: Convert to fraction form
    309,315.36/426,835 = 181,966.36/x
  3. Step 3: Cross multiply
    309,315.36x = 426,835 × 181,966.36
  4. Step 4: Simplify right side
    309,315.36x = 77,669,611,270.60
  5. Step 5: Solve for x
    x = 77,669,611,270.60/309,315.36
  6. Step 6: Final answer
    x = 251,101.70

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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.