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Finding the Fourth Proportional to 711,995.32, 982,551.90 and 389,702.59

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Solution

The fourth proportional to 711,995.32, 982,551.90 and 389,702.59 is: 537,788.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,995.32 : 982,551.90 = 389,702.59 : x
  2. Step 2: Convert to fraction form
    711,995.32/982,551.90 = 389,702.59/x
  3. Step 3: Cross multiply
    711,995.32x = 982,551.90 × 389,702.59
  4. Step 4: Simplify right side
    711,995.32x = 382,903,021,483.17
  5. Step 5: Solve for x
    x = 382,903,021,483.17/711,995.32
  6. Step 6: Final answer
    x = 537,788.68

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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.