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Finding the Fourth Proportional to 390,496.14, 585,074.88 and 262,172.03

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Solution

The fourth proportional to 390,496.14, 585,074.88 and 262,172.03 is: 392,808.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,496.14 : 585,074.88 = 262,172.03 : x
  2. Step 2: Convert to fraction form
    390,496.14/585,074.88 = 262,172.03/x
  3. Step 3: Cross multiply
    390,496.14x = 585,074.88 × 262,172.03
  4. Step 4: Simplify right side
    390,496.14x = 153,390,266,066.23
  5. Step 5: Solve for x
    x = 153,390,266,066.23/390,496.14
  6. Step 6: Final answer
    x = 392,808.66

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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.