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Finding the Fourth Proportional to 390,060.30, 585,090.45 and 390,060.30

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Solution

The fourth proportional to 390,060.30, 585,090.45 and 390,060.30 is: 585,090.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,060.30 : 585,090.45 = 390,060.30 : x
  2. Step 2: Convert to fraction form
    390,060.30/585,090.45 = 390,060.30/x
  3. Step 3: Cross multiply
    390,060.30x = 585,090.45 × 390,060.30
  4. Step 4: Simplify right side
    390,060.30x = 228,220,556,454.14
  5. Step 5: Solve for x
    x = 228,220,556,454.14/390,060.30
  6. Step 6: Final answer
    x = 585,090.45

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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.