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Finding the Fourth Proportional to 503,815.43, 695,328.86 and 288,950.88

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Solution

The fourth proportional to 503,815.43, 695,328.86 and 288,950.88 is: 398,788.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,815.43 : 695,328.86 = 288,950.88 : x
  2. Step 2: Convert to fraction form
    503,815.43/695,328.86 = 288,950.88/x
  3. Step 3: Cross multiply
    503,815.43x = 695,328.86 × 288,950.88
  4. Step 4: Simplify right side
    503,815.43x = 200,915,884,541.64
  5. Step 5: Solve for x
    x = 200,915,884,541.64/503,815.43
  6. Step 6: Final answer
    x = 398,788.67

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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.