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Finding the Fourth Proportional to 708,811.33, 978,184.16 and 402,900.52

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Solution

The fourth proportional to 708,811.33, 978,184.16 and 402,900.52 is: 556,016.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,811.33 : 978,184.16 = 402,900.52 : x
  2. Step 2: Convert to fraction form
    708,811.33/978,184.16 = 402,900.52/x
  3. Step 3: Cross multiply
    708,811.33x = 978,184.16 × 402,900.52
  4. Step 4: Simplify right side
    708,811.33x = 394,110,904,705.26
  5. Step 5: Solve for x
    x = 394,110,904,705.26/708,811.33
  6. Step 6: Final answer
    x = 556,016.65

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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.