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Finding the Fourth Proportional to 280,930.17, 387,683.64 and 153,605.76

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Solution

The fourth proportional to 280,930.17, 387,683.64 and 153,605.76 is: 211,975.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,930.17 : 387,683.64 = 153,605.76 : x
  2. Step 2: Convert to fraction form
    280,930.17/387,683.64 = 153,605.76/x
  3. Step 3: Cross multiply
    280,930.17x = 387,683.64 × 153,605.76
  4. Step 4: Simplify right side
    280,930.17x = 59,550,440,161.77
  5. Step 5: Solve for x
    x = 59,550,440,161.77/280,930.17
  6. Step 6: Final answer
    x = 211,975.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.