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Finding the Fourth Proportional to 714,978.95, 986,430.90 and 404,839.23

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Solution

The fourth proportional to 714,978.95, 986,430.90 and 404,839.23 is: 558,542.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,978.95 : 986,430.90 = 404,839.23 : x
  2. Step 2: Convert to fraction form
    714,978.95/986,430.90 = 404,839.23/x
  3. Step 3: Cross multiply
    714,978.95x = 986,430.90 × 404,839.23
  4. Step 4: Simplify right side
    714,978.95x = 399,345,926,004.21
  5. Step 5: Solve for x
    x = 399,345,926,004.21/714,978.95
  6. Step 6: Final answer
    x = 558,542.21

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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.