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Finding the Fourth Proportional to 648,857.00, 894,924.90 and 390,464.57

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Solution

The fourth proportional to 648,857.00, 894,924.90 and 390,464.57 is: 538,541.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,857.00 : 894,924.90 = 390,464.57 : x
  2. Step 2: Convert to fraction form
    648,857.00/894,924.90 = 390,464.57/x
  3. Step 3: Cross multiply
    648,857.00x = 894,924.90 × 390,464.57
  4. Step 4: Simplify right side
    648,857.00x = 349,436,461,786.17
  5. Step 5: Solve for x
    x = 349,436,461,786.17/648,857.00
  6. Step 6: Final answer
    x = 538,541.57

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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.