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Finding the Fourth Proportional to 258,894.80, 357,090.78 and 172,810.38

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Solution

The fourth proportional to 258,894.80, 357,090.78 and 172,810.38 is: 238,355.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,894.80 : 357,090.78 = 172,810.38 : x
  2. Step 2: Convert to fraction form
    258,894.80/357,090.78 = 172,810.38/x
  3. Step 3: Cross multiply
    258,894.80x = 357,090.78 × 172,810.38
  4. Step 4: Simplify right side
    258,894.80x = 61,708,993,386.30
  5. Step 5: Solve for x
    x = 61,708,993,386.30/258,894.80
  6. Step 6: Final answer
    x = 238,355.48

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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.