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Finding the Fourth Proportional to 678,036, 1,017,054.12 and 528,388.32

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Solution

The fourth proportional to 678,036, 1,017,054.12 and 528,388.32 is: 792,582.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,036 : 1,017,054.12 = 528,388.32 : x
  2. Step 2: Convert to fraction form
    678,036/1,017,054.12 = 528,388.32/x
  3. Step 3: Cross multiply
    678,036x = 1,017,054.12 × 528,388.32
  4. Step 4: Simplify right side
    678,036x = 537,399,517,815.88
  5. Step 5: Solve for x
    x = 537,399,517,815.88/678,036
  6. Step 6: Final answer
    x = 792,582.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.