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Finding the Fourth Proportional to 693,715.47, 957,331.19 and 387,804.74

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Solution

The fourth proportional to 693,715.47, 957,331.19 and 387,804.74 is: 535,172.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,715.47 : 957,331.19 = 387,804.74 : x
  2. Step 2: Convert to fraction form
    693,715.47/957,331.19 = 387,804.74/x
  3. Step 3: Cross multiply
    693,715.47x = 957,331.19 × 387,804.74
  4. Step 4: Simplify right side
    693,715.47x = 371,257,576,935.41
  5. Step 5: Solve for x
    x = 371,257,576,935.41/693,715.47
  6. Step 6: Final answer
    x = 535,172.69

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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.