Home / 405,317.28-559,328.12-221,547.64

Finding the Fourth Proportional to 405,317.28, 559,328.12 and 221,547.64

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Solution

The fourth proportional to 405,317.28, 559,328.12 and 221,547.64 is: 305,730.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,317.28 : 559,328.12 = 221,547.64 : x
  2. Step 2: Convert to fraction form
    405,317.28/559,328.12 = 221,547.64/x
  3. Step 3: Cross multiply
    405,317.28x = 559,328.12 × 221,547.64
  4. Step 4: Simplify right side
    405,317.28x = 123,917,823,863.90
  5. Step 5: Solve for x
    x = 123,917,823,863.90/405,317.28
  6. Step 6: Final answer
    x = 305,730.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.