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Finding the Fourth Proportional to 658,255.80, 987,417.84 and 209,011.80

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Solution

The fourth proportional to 658,255.80, 987,417.84 and 209,011.80 is: 313,528.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,255.80 : 987,417.84 = 209,011.80 : x
  2. Step 2: Convert to fraction form
    658,255.80/987,417.84 = 209,011.80/x
  3. Step 3: Cross multiply
    658,255.80x = 987,417.84 × 209,011.80
  4. Step 4: Simplify right side
    658,255.80x = 206,381,980,090.51
  5. Step 5: Solve for x
    x = 206,381,980,090.51/658,255.80
  6. Step 6: Final answer
    x = 313,528.54

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1.5x scale

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.