Home / 487,454,149.53-672,686,726.33-278,614,776.21

Finding the Fourth Proportional to 487,454,149.53, 672,686,726.33 and 278,614,776.21

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Solution

The fourth proportional to 487,454,149.53, 672,686,726.33 and 278,614,776.21 is: 384,488,391.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,454,149.53 : 672,686,726.33 = 278,614,776.21 : x
  2. Step 2: Convert to fraction form
    487,454,149.53/672,686,726.33 = 278,614,776.21/x
  3. Step 3: Cross multiply
    487,454,149.53x = 672,686,726.33 × 278,614,776.21
  4. Step 4: Simplify right side
    487,454,149.53x = 187,420,461,714,477,376
  5. Step 5: Solve for x
    x = 187,420,461,714,477,376/487,454,149.53
  6. Step 6: Final answer
    x = 384,488,391.15

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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.