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Finding the Fourth Proportional to 390,018.30, 585,027.45 and 248,300.70

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Solution

The fourth proportional to 390,018.30, 585,027.45 and 248,300.70 is: 372,451.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,018.30 : 585,027.45 = 248,300.70 : x
  2. Step 2: Convert to fraction form
    390,018.30/585,027.45 = 248,300.70/x
  3. Step 3: Cross multiply
    390,018.30x = 585,027.45 × 248,300.70
  4. Step 4: Simplify right side
    390,018.30x = 145,262,725,354.22
  5. Step 5: Solve for x
    x = 145,262,725,354.22/390,018.30
  6. Step 6: Final answer
    x = 372,451.05

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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.