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Finding the Fourth Proportional to 520,368.76, 718,069.14 and 316,391.56

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Solution

The fourth proportional to 520,368.76, 718,069.14 and 316,391.56 is: 436,596.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,368.76 : 718,069.14 = 316,391.56 : x
  2. Step 2: Convert to fraction form
    520,368.76/718,069.14 = 316,391.56/x
  3. Step 3: Cross multiply
    520,368.76x = 718,069.14 × 316,391.56
  4. Step 4: Simplify right side
    520,368.76x = 227,191,015,392.46
  5. Step 5: Solve for x
    x = 227,191,015,392.46/520,368.76
  6. Step 6: Final answer
    x = 436,596.18

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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.