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Finding the Fourth Proportional to 403,339.40, 605,009.10 and 348,043.40

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Solution

The fourth proportional to 403,339.40, 605,009.10 and 348,043.40 is: 522,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,339.40 : 605,009.10 = 348,043.40 : x
  2. Step 2: Convert to fraction form
    403,339.40/605,009.10 = 348,043.40/x
  3. Step 3: Cross multiply
    403,339.40x = 605,009.10 × 348,043.40
  4. Step 4: Simplify right side
    403,339.40x = 210,569,424,194.94
  5. Step 5: Solve for x
    x = 210,569,424,194.94/403,339.40
  6. Step 6: Final answer
    x = 522,065.10

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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.