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Finding the Fourth Proportional to 688,653.91, 950,233.80 and 398,157.45

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Solution

The fourth proportional to 688,653.91, 950,233.80 and 398,157.45 is: 549,394.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,653.91 : 950,233.80 = 398,157.45 : x
  2. Step 2: Convert to fraction form
    688,653.91/950,233.80 = 398,157.45/x
  3. Step 3: Cross multiply
    688,653.91x = 950,233.80 × 398,157.45
  4. Step 4: Simplify right side
    688,653.91x = 378,342,666,711.81
  5. Step 5: Solve for x
    x = 378,342,666,711.81/688,653.91
  6. Step 6: Final answer
    x = 549,394.49

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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.