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Finding the Fourth Proportional to 713,014.13, 983,959.51 and 390,736.91

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Solution

The fourth proportional to 713,014.13, 983,959.51 and 390,736.91 is: 539,216.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,014.13 : 983,959.51 = 390,736.91 : x
  2. Step 2: Convert to fraction form
    713,014.13/983,959.51 = 390,736.91/x
  3. Step 3: Cross multiply
    713,014.13x = 983,959.51 × 390,736.91
  4. Step 4: Simplify right side
    713,014.13x = 384,469,292,605.87
  5. Step 5: Solve for x
    x = 384,469,292,605.87/713,014.13
  6. Step 6: Final answer
    x = 539,216.94

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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.