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Finding the Fourth Proportional to 343,605.99, 515,483.07 and 103,699.85

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Solution

The fourth proportional to 343,605.99, 515,483.07 and 103,699.85 is: 155,572.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,605.99 : 515,483.07 = 103,699.85 : x
  2. Step 2: Convert to fraction form
    343,605.99/515,483.07 = 103,699.85/x
  3. Step 3: Cross multiply
    343,605.99x = 515,483.07 × 103,699.85
  4. Step 4: Simplify right side
    343,605.99x = 53,455,514,459.12
  5. Step 5: Solve for x
    x = 53,455,514,459.12/343,605.99
  6. Step 6: Final answer
    x = 155,572.13

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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.