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Finding the Fourth Proportional to 245,810.20, 339,250.40 and 138,401.16

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Solution

The fourth proportional to 245,810.20, 339,250.40 and 138,401.16 is: 191,011.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,810.20 : 339,250.40 = 138,401.16 : x
  2. Step 2: Convert to fraction form
    245,810.20/339,250.40 = 138,401.16/x
  3. Step 3: Cross multiply
    245,810.20x = 339,250.40 × 138,401.16
  4. Step 4: Simplify right side
    245,810.20x = 46,952,648,890.46
  5. Step 5: Solve for x
    x = 46,952,648,890.46/245,810.20
  6. Step 6: Final answer
    x = 191,011.80

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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.