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Finding the Fourth Proportional to 714,783.95, 986,419.08 and 388,110.85

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Solution

The fourth proportional to 714,783.95, 986,419.08 and 388,110.85 is: 535,602.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,783.95 : 986,419.08 = 388,110.85 : x
  2. Step 2: Convert to fraction form
    714,783.95/986,419.08 = 388,110.85/x
  3. Step 3: Cross multiply
    714,783.95x = 986,419.08 × 388,110.85
  4. Step 4: Simplify right side
    714,783.95x = 382,839,947,595.02
  5. Step 5: Solve for x
    x = 382,839,947,595.02/714,783.95
  6. Step 6: Final answer
    x = 535,602.33

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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.