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Finding the Fourth Proportional to 714,825.66, 986,470.71 and 388,138.49

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Solution

The fourth proportional to 714,825.66, 986,470.71 and 388,138.49 is: 535,637.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,825.66 : 986,470.71 = 388,138.49 : x
  2. Step 2: Convert to fraction form
    714,825.66/986,470.71 = 388,138.49/x
  3. Step 3: Cross multiply
    714,825.66x = 986,470.71 × 388,138.49
  4. Step 4: Simplify right side
    714,825.66x = 382,887,251,808.63
  5. Step 5: Solve for x
    x = 382,887,251,808.63/714,825.66
  6. Step 6: Final answer
    x = 535,637.25

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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.