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Finding the Fourth Proportional to 393,915.84, 544,056.48 and 286,964.16

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Solution

The fourth proportional to 393,915.84, 544,056.48 and 286,964.16 is: 396,340.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,915.84 : 544,056.48 = 286,964.16 : x
  2. Step 2: Convert to fraction form
    393,915.84/544,056.48 = 286,964.16/x
  3. Step 3: Cross multiply
    393,915.84x = 544,056.48 × 286,964.16
  4. Step 4: Simplify right side
    393,915.84x = 156,124,710,775.76
  5. Step 5: Solve for x
    x = 156,124,710,775.76/393,915.84
  6. Step 6: Final answer
    x = 396,340.27

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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.