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Finding the Fourth Proportional to 257,287.22, 355,056.36 and 156,685.22

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Solution

The fourth proportional to 257,287.22, 355,056.36 and 156,685.22 is: 216,225.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,287.22 : 355,056.36 = 156,685.22 : x
  2. Step 2: Convert to fraction form
    257,287.22/355,056.36 = 156,685.22/x
  3. Step 3: Cross multiply
    257,287.22x = 355,056.36 × 156,685.22
  4. Step 4: Simplify right side
    257,287.22x = 55,632,083,728.96
  5. Step 5: Solve for x
    x = 55,632,083,728.96/257,287.22
  6. Step 6: Final answer
    x = 216,225.60

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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.