Home / 720,614,746.32-994,449,815.28-390,590,108.88

Finding the Fourth Proportional to 720,614,746.32, 994,449,815.28 and 390,590,108.88

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Solution

The fourth proportional to 720,614,746.32, 994,449,815.28 and 390,590,108.88 is: 539,015,144.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,614,746.32 : 994,449,815.28 = 390,590,108.88 : x
  2. Step 2: Convert to fraction form
    720,614,746.32/994,449,815.28 = 390,590,108.88/x
  3. Step 3: Cross multiply
    720,614,746.32x = 994,449,815.28 × 390,590,108.88
  4. Step 4: Simplify right side
    720,614,746.32x = 388,422,261,625,911,040
  5. Step 5: Solve for x
    x = 388,422,261,625,911,040/720,614,746.32
  6. Step 6: Final answer
    x = 539,015,144.51

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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.