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Finding the Fourth Proportional to 307,980.21, 424,985.04 and 171,995.29

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Solution

The fourth proportional to 307,980.21, 424,985.04 and 171,995.29 is: 237,338.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,980.21 : 424,985.04 = 171,995.29 : x
  2. Step 2: Convert to fraction form
    307,980.21/424,985.04 = 171,995.29/x
  3. Step 3: Cross multiply
    307,980.21x = 424,985.04 × 171,995.29
  4. Step 4: Simplify right side
    307,980.21x = 73,095,425,200.46
  5. Step 5: Solve for x
    x = 73,095,425,200.46/307,980.21
  6. Step 6: Final answer
    x = 237,338.06

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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.