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Finding the Fourth Proportional to 315,434.66, 435,300.48 and 172,197.09

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Solution

The fourth proportional to 315,434.66, 435,300.48 and 172,197.09 is: 237,632.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,434.66 : 435,300.48 = 172,197.09 : x
  2. Step 2: Convert to fraction form
    315,434.66/435,300.48 = 172,197.09/x
  3. Step 3: Cross multiply
    315,434.66x = 435,300.48 × 172,197.09
  4. Step 4: Simplify right side
    315,434.66x = 74,957,475,931.60
  5. Step 5: Solve for x
    x = 74,957,475,931.60/315,434.66
  6. Step 6: Final answer
    x = 237,632.34

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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.