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Finding the Fourth Proportional to 354,420.80, 489,100.40 and 193,276.16

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Solution

The fourth proportional to 354,420.80, 489,100.40 and 193,276.16 is: 266,720.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,420.80 : 489,100.40 = 193,276.16 : x
  2. Step 2: Convert to fraction form
    354,420.80/489,100.40 = 193,276.16/x
  3. Step 3: Cross multiply
    354,420.80x = 489,100.40 × 193,276.16
  4. Step 4: Simplify right side
    354,420.80x = 94,531,447,166.46
  5. Step 5: Solve for x
    x = 94,531,447,166.46/354,420.80
  6. Step 6: Final answer
    x = 266,720.94

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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.