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Finding the Fourth Proportional to 625.60, 858.70 and 570.01

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Solution

The fourth proportional to 625.60, 858.70 and 570.01 is: 782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.60 : 858.70 = 570.01 : x
  2. Step 2: Convert to fraction form
    625.60/858.70 = 570.01/x
  3. Step 3: Cross multiply
    625.60x = 858.70 × 570.01
  4. Step 4: Simplify right side
    625.60x = 489,467.59
  5. Step 5: Solve for x
    x = 489,467.59/625.60
  6. Step 6: Final answer
    x = 782.40

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.