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Finding the Fourth Proportional to 560,314.89, 772,124.81 and 398,717.19

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Solution

The fourth proportional to 560,314.89, 772,124.81 and 398,717.19 is: 549,440.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,314.89 : 772,124.81 = 398,717.19 : x
  2. Step 2: Convert to fraction form
    560,314.89/772,124.81 = 398,717.19/x
  3. Step 3: Cross multiply
    560,314.89x = 772,124.81 × 398,717.19
  4. Step 4: Simplify right side
    560,314.89x = 307,859,432,578.90
  5. Step 5: Solve for x
    x = 307,859,432,578.90/560,314.89
  6. Step 6: Final answer
    x = 549,440.03

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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.