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Finding the Fourth Proportional to 288,687.84, 398,440.52 and 212,317.80

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Solution

The fourth proportional to 288,687.84, 398,440.52 and 212,317.80 is: 293,036.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,687.84 : 398,440.52 = 212,317.80 : x
  2. Step 2: Convert to fraction form
    288,687.84/398,440.52 = 212,317.80/x
  3. Step 3: Cross multiply
    288,687.84x = 398,440.52 × 212,317.80
  4. Step 4: Simplify right side
    288,687.84x = 84,596,014,637.26
  5. Step 5: Solve for x
    x = 84,596,014,637.26/288,687.84
  6. Step 6: Final answer
    x = 293,036.29

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1.5x scale

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.