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Finding the Fourth Proportional to 455,411.70, 683,117.55 and 139,827.60

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Solution

The fourth proportional to 455,411.70, 683,117.55 and 139,827.60 is: 209,741.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,411.70 : 683,117.55 = 139,827.60 : x
  2. Step 2: Convert to fraction form
    455,411.70/683,117.55 = 139,827.60/x
  3. Step 3: Cross multiply
    455,411.70x = 683,117.55 × 139,827.60
  4. Step 4: Simplify right side
    455,411.70x = 95,518,687,534.38
  5. Step 5: Solve for x
    x = 95,518,687,534.38/455,411.70
  6. Step 6: Final answer
    x = 209,741.40

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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.