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Finding the Fourth Proportional to 245,658.66, 339,004.98 and 138,228.63

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Solution

The fourth proportional to 245,658.66, 339,004.98 and 138,228.63 is: 190,753.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,658.66 : 339,004.98 = 138,228.63 : x
  2. Step 2: Convert to fraction form
    245,658.66/339,004.98 = 138,228.63/x
  3. Step 3: Cross multiply
    245,658.66x = 339,004.98 × 138,228.63
  4. Step 4: Simplify right side
    245,658.66x = 46,860,193,948.58
  5. Step 5: Solve for x
    x = 46,860,193,948.58/245,658.66
  6. Step 6: Final answer
    x = 190,753.28

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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.