Home / 643,844.53-888,508.91-402,267.20

Finding the Fourth Proportional to 643,844.53, 888,508.91 and 402,267.20

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Solution

The fourth proportional to 643,844.53, 888,508.91 and 402,267.20 is: 555,130.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,844.53 : 888,508.91 = 402,267.20 : x
  2. Step 2: Convert to fraction form
    643,844.53/888,508.91 = 402,267.20/x
  3. Step 3: Cross multiply
    643,844.53x = 888,508.91 × 402,267.20
  4. Step 4: Simplify right side
    643,844.53x = 357,417,987,963.88
  5. Step 5: Solve for x
    x = 357,417,987,963.88/643,844.53
  6. Step 6: Final answer
    x = 555,130.89

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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.