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Finding the Fourth Proportional to 462,981.78, 638,628.81 and 317,721.24

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Solution

The fourth proportional to 462,981.78, 638,628.81 and 317,721.24 is: 438,259.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,981.78 : 638,628.81 = 317,721.24 : x
  2. Step 2: Convert to fraction form
    462,981.78/638,628.81 = 317,721.24/x
  3. Step 3: Cross multiply
    462,981.78x = 638,628.81 × 317,721.24
  4. Step 4: Simplify right side
    462,981.78x = 202,905,937,412.92
  5. Step 5: Solve for x
    x = 202,905,937,412.92/462,981.78
  6. Step 6: Final answer
    x = 438,259.01

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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.