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Finding the Fourth Proportional to 708,943.99, 978,426.80 and 403,066.53

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Solution

The fourth proportional to 708,943.99, 978,426.80 and 403,066.53 is: 556,279.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,943.99 : 978,426.80 = 403,066.53 : x
  2. Step 2: Convert to fraction form
    708,943.99/978,426.80 = 403,066.53/x
  3. Step 3: Cross multiply
    708,943.99x = 978,426.80 × 403,066.53
  4. Step 4: Simplify right side
    708,943.99x = 394,371,095,135.00
  5. Step 5: Solve for x
    x = 394,371,095,135.00/708,943.99
  6. Step 6: Final answer
    x = 556,279.62

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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.