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Finding the Fourth Proportional to 404,345.40, 606,518.10 and 342,137.40

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Solution

The fourth proportional to 404,345.40, 606,518.10 and 342,137.40 is: 513,206.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,345.40 : 606,518.10 = 342,137.40 : x
  2. Step 2: Convert to fraction form
    404,345.40/606,518.10 = 342,137.40/x
  3. Step 3: Cross multiply
    404,345.40x = 606,518.10 × 342,137.40
  4. Step 4: Simplify right side
    404,345.40x = 207,512,525,786.94
  5. Step 5: Solve for x
    x = 207,512,525,786.94/404,345.40
  6. Step 6: Final answer
    x = 513,206.10

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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.