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Finding the Fourth Proportional to 520,386.87, 718,094.25 and 316,409.46

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Solution

The fourth proportional to 520,386.87, 718,094.25 and 316,409.46 is: 436,620.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,386.87 : 718,094.25 = 316,409.46 : x
  2. Step 2: Convert to fraction form
    520,386.87/718,094.25 = 316,409.46/x
  3. Step 3: Cross multiply
    520,386.87x = 718,094.25 × 316,409.46
  4. Step 4: Simplify right side
    520,386.87x = 227,211,813,871.61
  5. Step 5: Solve for x
    x = 227,211,813,871.61/520,386.87
  6. Step 6: Final answer
    x = 436,620.96

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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.