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Finding the Fourth Proportional to 708,975.62, 978,495.39 and 418,618.06

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Solution

The fourth proportional to 708,975.62, 978,495.39 and 418,618.06 is: 577,757.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,975.62 : 978,495.39 = 418,618.06 : x
  2. Step 2: Convert to fraction form
    708,975.62/978,495.39 = 418,618.06/x
  3. Step 3: Cross multiply
    708,975.62x = 978,495.39 × 418,618.06
  4. Step 4: Simplify right side
    708,975.62x = 409,615,839,434.51
  5. Step 5: Solve for x
    x = 409,615,839,434.51/708,975.62
  6. Step 6: Final answer
    x = 577,757.30

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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.