Home / 487,536.12-731,395.68-221,315.40

Finding the Fourth Proportional to 487,536.12, 731,395.68 and 221,315.40

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Solution

The fourth proportional to 487,536.12, 731,395.68 and 221,315.40 is: 332,014.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,536.12 : 731,395.68 = 221,315.40 : x
  2. Step 2: Convert to fraction form
    487,536.12/731,395.68 = 221,315.40/x
  3. Step 3: Cross multiply
    487,536.12x = 731,395.68 × 221,315.40
  4. Step 4: Simplify right side
    487,536.12x = 161,869,127,477.47
  5. Step 5: Solve for x
    x = 161,869,127,477.47/487,536.12
  6. Step 6: Final answer
    x = 332,014.64

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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.