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Finding the Fourth Proportional to 605,009.40, 907,514.10 and 405,943.80

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Solution

The fourth proportional to 605,009.40, 907,514.10 and 405,943.80 is: 608,915.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,009.40 : 907,514.10 = 405,943.80 : x
  2. Step 2: Convert to fraction form
    605,009.40/907,514.10 = 405,943.80/x
  3. Step 3: Cross multiply
    605,009.40x = 907,514.10 × 405,943.80
  4. Step 4: Simplify right side
    605,009.40x = 368,399,722,307.58
  5. Step 5: Solve for x
    x = 368,399,722,307.58/605,009.40
  6. Step 6: Final answer
    x = 608,915.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.