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Finding the Fourth Proportional to 553,252.35, 763,561 and 311,582.17

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Solution

The fourth proportional to 553,252.35, 763,561 and 311,582.17 is: 430,024.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,252.35 : 763,561 = 311,582.17 : x
  2. Step 2: Convert to fraction form
    553,252.35/763,561 = 311,582.17/x
  3. Step 3: Cross multiply
    553,252.35x = 763,561 × 311,582.17
  4. Step 4: Simplify right side
    553,252.35x = 237,911,993,307.37
  5. Step 5: Solve for x
    x = 237,911,993,307.37/553,252.35
  6. Step 6: Final answer
    x = 430,024.37

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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.