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Finding the Fourth Proportional to 547,409.60, 821,728.80 and 423,300.80

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Solution

The fourth proportional to 547,409.60, 821,728.80 and 423,300.80 is: 635,426.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,409.60 : 821,728.80 = 423,300.80 : x
  2. Step 2: Convert to fraction form
    547,409.60/821,728.80 = 423,300.80/x
  3. Step 3: Cross multiply
    547,409.60x = 821,728.80 × 423,300.80
  4. Step 4: Simplify right side
    547,409.60x = 347,838,458,423.04
  5. Step 5: Solve for x
    x = 347,838,458,423.04/547,409.60
  6. Step 6: Final answer
    x = 635,426.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.