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Finding the Fourth Proportional to 455,605.20, 683,407.80 and 406,616.40

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Solution

The fourth proportional to 455,605.20, 683,407.80 and 406,616.40 is: 609,924.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,605.20 : 683,407.80 = 406,616.40 : x
  2. Step 2: Convert to fraction form
    455,605.20/683,407.80 = 406,616.40/x
  3. Step 3: Cross multiply
    455,605.20x = 683,407.80 × 406,616.40
  4. Step 4: Simplify right side
    455,605.20x = 277,884,819,367.92
  5. Step 5: Solve for x
    x = 277,884,819,367.92/455,605.20
  6. Step 6: Final answer
    x = 609,924.60

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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.