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Finding the Fourth Proportional to 280,607.41, 387,223.77 and 153,258.40

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Solution

The fourth proportional to 280,607.41, 387,223.77 and 153,258.40 is: 211,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,607.41 : 387,223.77 = 153,258.40 : x
  2. Step 2: Convert to fraction form
    280,607.41/387,223.77 = 153,258.40/x
  3. Step 3: Cross multiply
    280,607.41x = 387,223.77 × 153,258.40
  4. Step 4: Simplify right side
    280,607.41x = 59,345,295,432.17
  5. Step 5: Solve for x
    x = 59,345,295,432.17/280,607.41
  6. Step 6: Final answer
    x = 211,488.70

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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.