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Finding the Fourth Proportional to 712,803.25, 983,670.29 and 390,519.73

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Solution

The fourth proportional to 712,803.25, 983,670.29 and 390,519.73 is: 538,918.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,803.25 : 983,670.29 = 390,519.73 : x
  2. Step 2: Convert to fraction form
    712,803.25/983,670.29 = 390,519.73/x
  3. Step 3: Cross multiply
    712,803.25x = 983,670.29 × 390,519.73
  4. Step 4: Simplify right side
    712,803.25x = 384,142,656,059.82
  5. Step 5: Solve for x
    x = 384,142,656,059.82/712,803.25
  6. Step 6: Final answer
    x = 538,918.22

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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.