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Finding the Fourth Proportional to 257,657.12, 355,386.93 and 248,986.88

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Solution

The fourth proportional to 257,657.12, 355,386.93 and 248,986.88 is: 343,428.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,657.12 : 355,386.93 = 248,986.88 : x
  2. Step 2: Convert to fraction form
    257,657.12/355,386.93 = 248,986.88/x
  3. Step 3: Cross multiply
    257,657.12x = 355,386.93 × 248,986.88
  4. Step 4: Simplify right side
    257,657.12x = 88,486,682,893.48
  5. Step 5: Solve for x
    x = 88,486,682,893.48/257,657.12
  6. Step 6: Final answer
    x = 343,428.05

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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.