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Finding the Fourth Proportional to 714,803.69, 986,431.77 and 388,117.19

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Solution

The fourth proportional to 714,803.69, 986,431.77 and 388,117.19 is: 535,603.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,803.69 : 986,431.77 = 388,117.19 : x
  2. Step 2: Convert to fraction form
    714,803.69/986,431.77 = 388,117.19/x
  3. Step 3: Cross multiply
    714,803.69x = 986,431.77 × 388,117.19
  4. Step 4: Simplify right side
    714,803.69x = 382,851,121,766.97
  5. Step 5: Solve for x
    x = 382,851,121,766.97/714,803.69
  6. Step 6: Final answer
    x = 535,603.17

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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.