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Finding the Fourth Proportional to 680,742.65, 939,417.11 and 374,812.64

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Solution

The fourth proportional to 680,742.65, 939,417.11 and 374,812.64 is: 517,237.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,742.65 : 939,417.11 = 374,812.64 : x
  2. Step 2: Convert to fraction form
    680,742.65/939,417.11 = 374,812.64/x
  3. Step 3: Cross multiply
    680,742.65x = 939,417.11 × 374,812.64
  4. Step 4: Simplify right side
    680,742.65x = 352,105,405,417.48
  5. Step 5: Solve for x
    x = 352,105,405,417.48/680,742.65
  6. Step 6: Final answer
    x = 517,237.17

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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.