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Finding the Fourth Proportional to 390,055.60, 584,622.60 and 165,415.60

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Solution

The fourth proportional to 390,055.60, 584,622.60 and 165,415.60 is: 247,927.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,055.60 : 584,622.60 = 165,415.60 : x
  2. Step 2: Convert to fraction form
    390,055.60/584,622.60 = 165,415.60/x
  3. Step 3: Cross multiply
    390,055.60x = 584,622.60 × 165,415.60
  4. Step 4: Simplify right side
    390,055.60x = 96,705,698,152.56
  5. Step 5: Solve for x
    x = 96,705,698,152.56/390,055.60
  6. Step 6: Final answer
    x = 247,927.98

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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.