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Finding the Fourth Proportional to 257,308.70, 355,104.71 and 155,358.96

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Solution

The fourth proportional to 257,308.70, 355,104.71 and 155,358.96 is: 214,406.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,308.70 : 355,104.71 = 155,358.96 : x
  2. Step 2: Convert to fraction form
    257,308.70/355,104.71 = 155,358.96/x
  3. Step 3: Cross multiply
    257,308.70x = 355,104.71 × 155,358.96
  4. Step 4: Simplify right side
    257,308.70x = 55,168,697,659.91
  5. Step 5: Solve for x
    x = 55,168,697,659.91/257,308.70
  6. Step 6: Final answer
    x = 214,406.65

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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.