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Finding the Fourth Proportional to 561,607.70, 774,929.03 and 319,895.06

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Solution

The fourth proportional to 561,607.70, 774,929.03 and 319,895.06 is: 441,404.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,607.70 : 774,929.03 = 319,895.06 : x
  2. Step 2: Convert to fraction form
    561,607.70/774,929.03 = 319,895.06/x
  3. Step 3: Cross multiply
    561,607.70x = 774,929.03 × 319,895.06
  4. Step 4: Simplify right side
    561,607.70x = 247,895,963,073.47
  5. Step 5: Solve for x
    x = 247,895,963,073.47/561,607.70
  6. Step 6: Final answer
    x = 441,404.14

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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.