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Finding the Fourth Proportional to 714,781.26, 986,415.37 and 388,108.16

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Solution

The fourth proportional to 714,781.26, 986,415.37 and 388,108.16 is: 535,598.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,781.26 : 986,415.37 = 388,108.16 : x
  2. Step 2: Convert to fraction form
    714,781.26/986,415.37 = 388,108.16/x
  3. Step 3: Cross multiply
    714,781.26x = 986,415.37 × 388,108.16
  4. Step 4: Simplify right side
    714,781.26x = 382,835,852,043.13
  5. Step 5: Solve for x
    x = 382,835,852,043.13/714,781.26
  6. Step 6: Final answer
    x = 535,598.61

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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.