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Finding the Fourth Proportional to 711,813.46, 982,302.66 and 389,523.58

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Solution

The fourth proportional to 711,813.46, 982,302.66 and 389,523.58 is: 537,542.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,813.46 : 982,302.66 = 389,523.58 : x
  2. Step 2: Convert to fraction form
    711,813.46/982,302.66 = 389,523.58/x
  3. Step 3: Cross multiply
    711,813.46x = 982,302.66 × 389,523.58
  4. Step 4: Simplify right side
    711,813.46x = 382,630,043,855.21
  5. Step 5: Solve for x
    x = 382,630,043,855.21/711,813.46
  6. Step 6: Final answer
    x = 537,542.58

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Double scale
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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.