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Finding the Fourth Proportional to 715,160.22, 986,750.96 and 405,065.49

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Solution

The fourth proportional to 715,160.22, 986,750.96 and 405,065.49 is: 558,894.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,160.22 : 986,750.96 = 405,065.49 : x
  2. Step 2: Convert to fraction form
    715,160.22/986,750.96 = 405,065.49/x
  3. Step 3: Cross multiply
    715,160.22x = 986,750.96 × 405,065.49
  4. Step 4: Simplify right side
    715,160.22x = 399,698,759,095.04
  5. Step 5: Solve for x
    x = 399,698,759,095.04/715,160.22
  6. Step 6: Final answer
    x = 558,894.00

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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.