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Finding the Fourth Proportional to 390,560, 585,840.12 and 95,072

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Solution

The fourth proportional to 390,560, 585,840.12 and 95,072 is: 142,608.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,560 : 585,840.12 = 95,072 : x
  2. Step 2: Convert to fraction form
    390,560/585,840.12 = 95,072/x
  3. Step 3: Cross multiply
    390,560x = 585,840.12 × 95,072
  4. Step 4: Simplify right side
    390,560x = 55,696,991,888.64
  5. Step 5: Solve for x
    x = 55,696,991,888.64/390,560
  6. Step 6: Final answer
    x = 142,608.03

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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.