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Finding the Fourth Proportional to 573.70, 858.93 and 390.10

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Solution

The fourth proportional to 573.70, 858.93 and 390.10 is: 584.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.70 : 858.93 = 390.10 : x
  2. Step 2: Convert to fraction form
    573.70/858.93 = 390.10/x
  3. Step 3: Cross multiply
    573.70x = 858.93 × 390.10
  4. Step 4: Simplify right side
    573.70x = 335,068.59
  5. Step 5: Solve for x
    x = 335,068.59/573.70
  6. Step 6: Final answer
    x = 584.05

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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.