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Finding the Fourth Proportional to 547,407.20, 821,105.10 and 173,430.20

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Solution

The fourth proportional to 547,407.20, 821,105.10 and 173,430.20 is: 260,143.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,407.20 : 821,105.10 = 173,430.20 : x
  2. Step 2: Convert to fraction form
    547,407.20/821,105.10 = 173,430.20/x
  3. Step 3: Cross multiply
    547,407.20x = 821,105.10 × 173,430.20
  4. Step 4: Simplify right side
    547,407.20x = 142,404,421,714.02
  5. Step 5: Solve for x
    x = 142,404,421,714.02/547,407.20
  6. Step 6: Final answer
    x = 260,143.49

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Half scale
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Double scale
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Similar ratio
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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.