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Finding the Fourth Proportional to 548,436.30, 821,488.05 and 455,124.30

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Solution

The fourth proportional to 548,436.30, 821,488.05 and 455,124.30 is: 681,718.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,436.30 : 821,488.05 = 455,124.30 : x
  2. Step 2: Convert to fraction form
    548,436.30/821,488.05 = 455,124.30/x
  3. Step 3: Cross multiply
    548,436.30x = 821,488.05 × 455,124.30
  4. Step 4: Simplify right side
    548,436.30x = 373,879,173,714.62
  5. Step 5: Solve for x
    x = 373,879,173,714.62/548,436.30
  6. Step 6: Final answer
    x = 681,718.50

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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.