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Finding the Fourth Proportional to 520,370.76, 718,071.90 and 316,393.56

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Solution

The fourth proportional to 520,370.76, 718,071.90 and 316,393.56 is: 436,598.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,370.76 : 718,071.90 = 316,393.56 : x
  2. Step 2: Convert to fraction form
    520,370.76/718,071.90 = 316,393.56/x
  3. Step 3: Cross multiply
    520,370.76x = 718,071.90 × 316,393.56
  4. Step 4: Simplify right side
    520,370.76x = 227,193,324,776.96
  5. Step 5: Solve for x
    x = 227,193,324,776.96/520,370.76
  6. Step 6: Final answer
    x = 436,598.94

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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.