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Finding the Fourth Proportional to 712,230, 982,876.95 and 389,940.01

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Solution

The fourth proportional to 712,230, 982,876.95 and 389,940.01 is: 538,116.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,230 : 982,876.95 = 389,940.01 : x
  2. Step 2: Convert to fraction form
    712,230/982,876.95 = 389,940.01/x
  3. Step 3: Cross multiply
    712,230x = 982,876.95 × 389,940.01
  4. Step 4: Simplify right side
    712,230x = 383,263,047,711.77
  5. Step 5: Solve for x
    x = 383,263,047,711.77/712,230
  6. Step 6: Final answer
    x = 538,116.97

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1.5x scale

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.