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Finding the Fourth Proportional to 560.03, 840.55 and 286.31

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Solution

The fourth proportional to 560.03, 840.55 and 286.31 is: 429.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.03 : 840.55 = 286.31 : x
  2. Step 2: Convert to fraction form
    560.03/840.55 = 286.31/x
  3. Step 3: Cross multiply
    560.03x = 840.55 × 286.31
  4. Step 4: Simplify right side
    560.03x = 240,657.87
  5. Step 5: Solve for x
    x = 240,657.87/560.03
  6. Step 6: Final answer
    x = 429.72

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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.