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Finding the Fourth Proportional to 561,710.19, 775,165.22 and 319,989.18

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Solution

The fourth proportional to 561,710.19, 775,165.22 and 319,989.18 is: 441,588.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,710.19 : 775,165.22 = 319,989.18 : x
  2. Step 2: Convert to fraction form
    561,710.19/775,165.22 = 319,989.18/x
  3. Step 3: Cross multiply
    561,710.19x = 775,165.22 × 319,989.18
  4. Step 4: Simplify right side
    561,710.19x = 248,044,483,112.32
  5. Step 5: Solve for x
    x = 248,044,483,112.32/561,710.19
  6. Step 6: Final answer
    x = 441,588.01

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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.