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Finding the Fourth Proportional to 380,462.94, 570,521.88 and 143,637.57

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Solution

The fourth proportional to 380,462.94, 570,521.88 and 143,637.57 is: 215,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,462.94 : 570,521.88 = 143,637.57 : x
  2. Step 2: Convert to fraction form
    380,462.94/570,521.88 = 143,637.57/x
  3. Step 3: Cross multiply
    380,462.94x = 570,521.88 × 143,637.57
  4. Step 4: Simplify right side
    380,462.94x = 81,948,376,475.03
  5. Step 5: Solve for x
    x = 81,948,376,475.03/380,462.94
  6. Step 6: Final answer
    x = 215,391.22

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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.