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Finding the Fourth Proportional to 608,571.64, 912,878.28 and 209,209

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Solution

The fourth proportional to 608,571.64, 912,878.28 and 209,209 is: 313,820.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,571.64 : 912,878.28 = 209,209 : x
  2. Step 2: Convert to fraction form
    608,571.64/912,878.28 = 209,209/x
  3. Step 3: Cross multiply
    608,571.64x = 912,878.28 × 209,209
  4. Step 4: Simplify right side
    608,571.64x = 190,982,352,080.52
  5. Step 5: Solve for x
    x = 190,982,352,080.52/608,571.64
  6. Step 6: Final answer
    x = 313,820.66

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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.