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Finding the Fourth Proportional to 711,643.84, 982,070.87 and 389,352.94

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Solution

The fourth proportional to 711,643.84, 982,070.87 and 389,352.94 is: 537,308.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,643.84 : 982,070.87 = 389,352.94 : x
  2. Step 2: Convert to fraction form
    711,643.84/982,070.87 = 389,352.94/x
  3. Step 3: Cross multiply
    711,643.84x = 982,070.87 × 389,352.94
  4. Step 4: Simplify right side
    711,643.84x = 382,372,176,120.92
  5. Step 5: Solve for x
    x = 382,372,176,120.92/711,643.84
  6. Step 6: Final answer
    x = 537,308.35

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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.