Home / 715,660.20-987,618.84-388,973.16

Finding the Fourth Proportional to 715,660.20, 987,618.84 and 388,973.16

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Solution

The fourth proportional to 715,660.20, 987,618.84 and 388,973.16 is: 536,787.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,660.20 : 987,618.84 = 388,973.16 : x
  2. Step 2: Convert to fraction form
    715,660.20/987,618.84 = 388,973.16/x
  3. Step 3: Cross multiply
    715,660.20x = 987,618.84 × 388,973.16
  4. Step 4: Simplify right side
    715,660.20x = 384,157,221,070.33
  5. Step 5: Solve for x
    x = 384,157,221,070.33/715,660.20
  6. Step 6: Final answer
    x = 536,787.18

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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.