Home / 693,486.60-1,039,538.70-318,856.20

Finding the Fourth Proportional to 693,486.60, 1,039,538.70 and 318,856.20

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Solution

The fourth proportional to 693,486.60, 1,039,538.70 and 318,856.20 is: 477,966.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,486.60 : 1,039,538.70 = 318,856.20 : x
  2. Step 2: Convert to fraction form
    693,486.60/1,039,538.70 = 318,856.20/x
  3. Step 3: Cross multiply
    693,486.60x = 1,039,538.70 × 318,856.20
  4. Step 4: Simplify right side
    693,486.60x = 331,463,359,634.94
  5. Step 5: Solve for x
    x = 331,463,359,634.94/693,486.60
  6. Step 6: Final answer
    x = 477,966.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.