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Finding the Fourth Proportional to 317,397.88, 437,809.62 and 221,869.72

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Solution

The fourth proportional to 317,397.88, 437,809.62 and 221,869.72 is: 306,040.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,397.88 : 437,809.62 = 221,869.72 : x
  2. Step 2: Convert to fraction form
    317,397.88/437,809.62 = 221,869.72/x
  3. Step 3: Cross multiply
    317,397.88x = 437,809.62 × 221,869.72
  4. Step 4: Simplify right side
    317,397.88x = 97,136,697,802.71
  5. Step 5: Solve for x
    x = 97,136,697,802.71/317,397.88
  6. Step 6: Final answer
    x = 306,040.79

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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.