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Finding the Fourth Proportional to 245,468.65, 338,707.22 and 138,032.28

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Solution

The fourth proportional to 245,468.65, 338,707.22 and 138,032.28 is: 190,462.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,468.65 : 338,707.22 = 138,032.28 : x
  2. Step 2: Convert to fraction form
    245,468.65/338,707.22 = 138,032.28/x
  3. Step 3: Cross multiply
    245,468.65x = 338,707.22 × 138,032.28
  4. Step 4: Simplify right side
    245,468.65x = 46,752,528,962.72
  5. Step 5: Solve for x
    x = 46,752,528,962.72/245,468.65
  6. Step 6: Final answer
    x = 190,462.32

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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.