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Finding the Fourth Proportional to 708,907.17, 978,350.13 and 403,079.52

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Solution

The fourth proportional to 708,907.17, 978,350.13 and 403,079.52 is: 556,282.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,907.17 : 978,350.13 = 403,079.52 : x
  2. Step 2: Convert to fraction form
    708,907.17/978,350.13 = 403,079.52/x
  3. Step 3: Cross multiply
    708,907.17x = 978,350.13 × 403,079.52
  4. Step 4: Simplify right side
    708,907.17x = 394,352,900,792.34
  5. Step 5: Solve for x
    x = 394,352,900,792.34/708,907.17
  6. Step 6: Final answer
    x = 556,282.85

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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.