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Finding the Fourth Proportional to 257,347.95, 355,055.04 and 155,334.66

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Solution

The fourth proportional to 257,347.95, 355,055.04 and 155,334.66 is: 214,310.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,347.95 : 355,055.04 = 155,334.66 : x
  2. Step 2: Convert to fraction form
    257,347.95/355,055.04 = 155,334.66/x
  3. Step 3: Cross multiply
    257,347.95x = 355,055.04 × 155,334.66
  4. Step 4: Simplify right side
    257,347.95x = 55,152,353,919.69
  5. Step 5: Solve for x
    x = 55,152,353,919.69/257,347.95
  6. Step 6: Final answer
    x = 214,310.45

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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.