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Finding the Fourth Proportional to 280,386.86, 386,934.45 and 153,064.58

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Solution

The fourth proportional to 280,386.86, 386,934.45 and 153,064.58 is: 211,229.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,386.86 : 386,934.45 = 153,064.58 : x
  2. Step 2: Convert to fraction form
    280,386.86/386,934.45 = 153,064.58/x
  3. Step 3: Cross multiply
    280,386.86x = 386,934.45 × 153,064.58
  4. Step 4: Simplify right side
    280,386.86x = 59,225,959,076.78
  5. Step 5: Solve for x
    x = 59,225,959,076.78/280,386.86
  6. Step 6: Final answer
    x = 211,229.44

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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.