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Finding the Fourth Proportional to 257,646.33, 355,555.62 and 155,657.61

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Solution

The fourth proportional to 257,646.33, 355,555.62 and 155,657.61 is: 214,809.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,646.33 : 355,555.62 = 155,657.61 : x
  2. Step 2: Convert to fraction form
    257,646.33/355,555.62 = 155,657.61/x
  3. Step 3: Cross multiply
    257,646.33x = 355,555.62 × 155,657.61
  4. Step 4: Simplify right side
    257,646.33x = 55,344,938,031.27
  5. Step 5: Solve for x
    x = 55,344,938,031.27/257,646.33
  6. Step 6: Final answer
    x = 214,809.73

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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.