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Finding the Fourth Proportional to 571,531.80, 857,188.40 and 287,143.54

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Solution

The fourth proportional to 571,531.80, 857,188.40 and 287,143.54 is: 430,660.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,531.80 : 857,188.40 = 287,143.54 : x
  2. Step 2: Convert to fraction form
    571,531.80/857,188.40 = 287,143.54/x
  3. Step 3: Cross multiply
    571,531.80x = 857,188.40 × 287,143.54
  4. Step 4: Simplify right side
    571,531.80x = 246,136,114,878.94
  5. Step 5: Solve for x
    x = 246,136,114,878.94/571,531.80
  6. Step 6: Final answer
    x = 430,660.40

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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.