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Finding the Fourth Proportional to 691,853.04, 954,755.64 and 390,044.88

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Solution

The fourth proportional to 691,853.04, 954,755.64 and 390,044.88 is: 538,261.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,853.04 : 954,755.64 = 390,044.88 : x
  2. Step 2: Convert to fraction form
    691,853.04/954,755.64 = 390,044.88/x
  3. Step 3: Cross multiply
    691,853.04x = 954,755.64 × 390,044.88
  4. Step 4: Simplify right side
    691,853.04x = 372,397,549,033.12
  5. Step 5: Solve for x
    x = 372,397,549,033.12/691,853.04
  6. Step 6: Final answer
    x = 538,261.06

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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.