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Finding the Fourth Proportional to 678,532.29, 936,308.29 and 392,046.23

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Solution

The fourth proportional to 678,532.29, 936,308.29 and 392,046.23 is: 540,985.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,532.29 : 936,308.29 = 392,046.23 : x
  2. Step 2: Convert to fraction form
    678,532.29/936,308.29 = 392,046.23/x
  3. Step 3: Cross multiply
    678,532.29x = 936,308.29 × 392,046.23
  4. Step 4: Simplify right side
    678,532.29x = 367,076,133,061.75
  5. Step 5: Solve for x
    x = 367,076,133,061.75/678,532.29
  6. Step 6: Final answer
    x = 540,985.50

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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.