Home / 429,455.48-643,918.64-145,119.16

Finding the Fourth Proportional to 429,455.48, 643,918.64 and 145,119.16

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Solution

The fourth proportional to 429,455.48, 643,918.64 and 145,119.16 is: 217,589.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,455.48 : 643,918.64 = 145,119.16 : x
  2. Step 2: Convert to fraction form
    429,455.48/643,918.64 = 145,119.16/x
  3. Step 3: Cross multiply
    429,455.48x = 643,918.64 × 145,119.16
  4. Step 4: Simplify right side
    429,455.48x = 93,444,932,145.14
  5. Step 5: Solve for x
    x = 93,444,932,145.14/429,455.48
  6. Step 6: Final answer
    x = 217,589.33

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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.