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Finding the Fourth Proportional to 712,526.52, 983,297.70 and 390,230.76

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Solution

The fourth proportional to 712,526.52, 983,297.70 and 390,230.76 is: 538,524.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,526.52 : 983,297.70 = 390,230.76 : x
  2. Step 2: Convert to fraction form
    712,526.52/983,297.70 = 390,230.76/x
  3. Step 3: Cross multiply
    712,526.52x = 983,297.70 × 390,230.76
  4. Step 4: Simplify right side
    712,526.52x = 383,713,008,777.25
  5. Step 5: Solve for x
    x = 383,713,008,777.25/712,526.52
  6. Step 6: Final answer
    x = 538,524.53

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Half scale
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Double scale
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Similar ratio
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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.