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Finding the Fourth Proportional to 939,657.88, 1,296,728.78 and 509,938.10

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Solution

The fourth proportional to 939,657.88, 1,296,728.78 and 509,938.10 is: 703,715.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,657.88 : 1,296,728.78 = 509,938.10 : x
  2. Step 2: Convert to fraction form
    939,657.88/1,296,728.78 = 509,938.10/x
  3. Step 3: Cross multiply
    939,657.88x = 1,296,728.78 × 509,938.10
  4. Step 4: Simplify right side
    939,657.88x = 661,251,403,804.87
  5. Step 5: Solve for x
    x = 661,251,403,804.87/939,657.88
  6. Step 6: Final answer
    x = 703,715.07

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Double scale
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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.