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Finding the Fourth Proportional to 721,804.40, 996,113.57 and 415,856.76

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Solution

The fourth proportional to 721,804.40, 996,113.57 and 415,856.76 is: 573,895.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,804.40 : 996,113.57 = 415,856.76 : x
  2. Step 2: Convert to fraction form
    721,804.40/996,113.57 = 415,856.76/x
  3. Step 3: Cross multiply
    721,804.40x = 996,113.57 × 415,856.76
  4. Step 4: Simplify right side
    721,804.40x = 414,240,559,732.95
  5. Step 5: Solve for x
    x = 414,240,559,732.95/721,804.40
  6. Step 6: Final answer
    x = 573,895.87

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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.