Home / 390,354.60-585,133.03-221,518.38

Finding the Fourth Proportional to 390,354.60, 585,133.03 and 221,518.38

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Solution

The fourth proportional to 390,354.60, 585,133.03 and 221,518.38 is: 332,051.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,354.60 : 585,133.03 = 221,518.38 : x
  2. Step 2: Convert to fraction form
    390,354.60/585,133.03 = 221,518.38/x
  3. Step 3: Cross multiply
    390,354.60x = 585,133.03 × 221,518.38
  4. Step 4: Simplify right side
    390,354.60x = 129,617,720,890.09
  5. Step 5: Solve for x
    x = 129,617,720,890.09/390,354.60
  6. Step 6: Final answer
    x = 332,051.22

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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.