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Finding the Fourth Proportional to 665,909.79, 998,554.16 and 345,975.65

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Solution

The fourth proportional to 665,909.79, 998,554.16 and 345,975.65 is: 518,802.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,909.79 : 998,554.16 = 345,975.65 : x
  2. Step 2: Convert to fraction form
    665,909.79/998,554.16 = 345,975.65/x
  3. Step 3: Cross multiply
    665,909.79x = 998,554.16 × 345,975.65
  4. Step 4: Simplify right side
    665,909.79x = 345,475,429,799.82
  5. Step 5: Solve for x
    x = 345,475,429,799.82/665,909.79
  6. Step 6: Final answer
    x = 518,802.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.