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Finding the Fourth Proportional to 325,426.60, 487,381.74 and 316,457.47

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Solution

The fourth proportional to 325,426.60, 487,381.74 and 316,457.47 is: 473,948.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,426.60 : 487,381.74 = 316,457.47 : x
  2. Step 2: Convert to fraction form
    325,426.60/487,381.74 = 316,457.47/x
  3. Step 3: Cross multiply
    325,426.60x = 487,381.74 × 316,457.47
  4. Step 4: Simplify right side
    325,426.60x = 154,235,592,364.60
  5. Step 5: Solve for x
    x = 154,235,592,364.60/325,426.60
  6. Step 6: Final answer
    x = 473,948.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.