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Finding the Fourth Proportional to 354,608.21, 489,397.02 and 216,867.71

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Solution

The fourth proportional to 354,608.21, 489,397.02 and 216,867.71 is: 299,300.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,608.21 : 489,397.02 = 216,867.71 : x
  2. Step 2: Convert to fraction form
    354,608.21/489,397.02 = 216,867.71/x
  3. Step 3: Cross multiply
    354,608.21x = 489,397.02 × 216,867.71
  4. Step 4: Simplify right side
    354,608.21x = 106,134,412,638.34
  5. Step 5: Solve for x
    x = 106,134,412,638.34/354,608.21
  6. Step 6: Final answer
    x = 299,300.49

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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.