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Finding the Fourth Proportional to 572.64, 858.40 and 511.52

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Solution

The fourth proportional to 572.64, 858.40 and 511.52 is: 766.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.64 : 858.40 = 511.52 : x
  2. Step 2: Convert to fraction form
    572.64/858.40 = 511.52/x
  3. Step 3: Cross multiply
    572.64x = 858.40 × 511.52
  4. Step 4: Simplify right side
    572.64x = 439,088.77
  5. Step 5: Solve for x
    x = 439,088.77/572.64
  6. Step 6: Final answer
    x = 766.78

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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.