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Finding the Fourth Proportional to 354,904.40, 489,703.56 and 211,672.40

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Solution

The fourth proportional to 354,904.40, 489,703.56 and 211,672.40 is: 292,069.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,904.40 : 489,703.56 = 211,672.40 : x
  2. Step 2: Convert to fraction form
    354,904.40/489,703.56 = 211,672.40/x
  3. Step 3: Cross multiply
    354,904.40x = 489,703.56 × 211,672.40
  4. Step 4: Simplify right side
    354,904.40x = 103,656,727,833.74
  5. Step 5: Solve for x
    x = 103,656,727,833.74/354,904.40
  6. Step 6: Final answer
    x = 292,069.44

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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.