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Finding the Fourth Proportional to 715,971.36, 988,044.16 and 393,702.32

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Solution

The fourth proportional to 715,971.36, 988,044.16 and 393,702.32 is: 543,311.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,971.36 : 988,044.16 = 393,702.32 : x
  2. Step 2: Convert to fraction form
    715,971.36/988,044.16 = 393,702.32/x
  3. Step 3: Cross multiply
    715,971.36x = 988,044.16 × 393,702.32
  4. Step 4: Simplify right side
    715,971.36x = 388,995,278,054.45
  5. Step 5: Solve for x
    x = 388,995,278,054.45/715,971.36
  6. Step 6: Final answer
    x = 543,311.23

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1.5x scale

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.