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Finding the Fourth Proportional to 403,378.98, 555,921.50 and 377,782.58

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Solution

The fourth proportional to 403,378.98, 555,921.50 and 377,782.58 is: 520,645.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,378.98 : 555,921.50 = 377,782.58 : x
  2. Step 2: Convert to fraction form
    403,378.98/555,921.50 = 377,782.58/x
  3. Step 3: Cross multiply
    403,378.98x = 555,921.50 × 377,782.58
  4. Step 4: Simplify right side
    403,378.98x = 210,017,453,878.95
  5. Step 5: Solve for x
    x = 210,017,453,878.95/403,378.98
  6. Step 6: Final answer
    x = 520,645.51

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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.