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Finding the Fourth Proportional to 354,902.40, 489,700.80 and 211,670.40

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Solution

The fourth proportional to 354,902.40, 489,700.80 and 211,670.40 is: 292,066.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,902.40 : 489,700.80 = 211,670.40 : x
  2. Step 2: Convert to fraction form
    354,902.40/489,700.80 = 211,670.40/x
  3. Step 3: Cross multiply
    354,902.40x = 489,700.80 × 211,670.40
  4. Step 4: Simplify right side
    354,902.40x = 103,655,164,216.32
  5. Step 5: Solve for x
    x = 103,655,164,216.32/354,902.40
  6. Step 6: Final answer
    x = 292,066.68

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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.