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Finding the Fourth Proportional to 559,782.21, 772,520.45 and 318,105.93

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Solution

The fourth proportional to 559,782.21, 772,520.45 and 318,105.93 is: 438,998.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,782.21 : 772,520.45 = 318,105.93 : x
  2. Step 2: Convert to fraction form
    559,782.21/772,520.45 = 318,105.93/x
  3. Step 3: Cross multiply
    559,782.21x = 772,520.45 × 318,105.93
  4. Step 4: Simplify right side
    559,782.21x = 245,743,334,600.74
  5. Step 5: Solve for x
    x = 245,743,334,600.74/559,782.21
  6. Step 6: Final answer
    x = 438,998.11

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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.