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Finding the Fourth Proportional to 309,684.19, 427,117.64 and 255,875.79

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Solution

The fourth proportional to 309,684.19, 427,117.64 and 255,875.79 is: 352,904.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,684.19 : 427,117.64 = 255,875.79 : x
  2. Step 2: Convert to fraction form
    309,684.19/427,117.64 = 255,875.79/x
  3. Step 3: Cross multiply
    309,684.19x = 427,117.64 × 255,875.79
  4. Step 4: Simplify right side
    309,684.19x = 109,289,063,557.94
  5. Step 5: Solve for x
    x = 109,289,063,557.94/309,684.19
  6. Step 6: Final answer
    x = 352,904.89

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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.