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Finding the Fourth Proportional to 939,418, 1,296,359.04 and 509,681.68

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Solution

The fourth proportional to 939,418, 1,296,359.04 and 509,681.68 is: 703,340.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,418 : 1,296,359.04 = 509,681.68 : x
  2. Step 2: Convert to fraction form
    939,418/1,296,359.04 = 509,681.68/x
  3. Step 3: Cross multiply
    939,418x = 1,296,359.04 × 509,681.68
  4. Step 4: Simplify right side
    939,418x = 660,730,453,390.39
  5. Step 5: Solve for x
    x = 660,730,453,390.39/939,418
  6. Step 6: Final answer
    x = 703,340.21

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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.