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Finding the Fourth Proportional to 547,612.60, 820,572.20 and 427,384.48

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Solution

The fourth proportional to 547,612.60, 820,572.20 and 427,384.48 is: 640,415.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,612.60 : 820,572.20 = 427,384.48 : x
  2. Step 2: Convert to fraction form
    547,612.60/820,572.20 = 427,384.48/x
  3. Step 3: Cross multiply
    547,612.60x = 820,572.20 × 427,384.48
  4. Step 4: Simplify right side
    547,612.60x = 350,699,822,999.46
  5. Step 5: Solve for x
    x = 350,699,822,999.46/547,612.60
  6. Step 6: Final answer
    x = 640,415.91

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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.