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Finding the Fourth Proportional to 390,868.60, 586,521.60 and 166,190.80

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Solution

The fourth proportional to 390,868.60, 586,521.60 and 166,190.80 is: 249,379.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,868.60 : 586,521.60 = 166,190.80 : x
  2. Step 2: Convert to fraction form
    390,868.60/586,521.60 = 166,190.80/x
  3. Step 3: Cross multiply
    390,868.60x = 586,521.60 × 166,190.80
  4. Step 4: Simplify right side
    390,868.60x = 97,474,493,921.28
  5. Step 5: Solve for x
    x = 97,474,493,921.28/390,868.60
  6. Step 6: Final answer
    x = 249,379.19

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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.