Home / 390,729.72-585,664.02-255,631.44

Finding the Fourth Proportional to 390,729.72, 585,664.02 and 255,631.44

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Solution

The fourth proportional to 390,729.72, 585,664.02 and 255,631.44 is: 383,165.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,729.72 : 585,664.02 = 255,631.44 : x
  2. Step 2: Convert to fraction form
    390,729.72/585,664.02 = 255,631.44/x
  3. Step 3: Cross multiply
    390,729.72x = 585,664.02 × 255,631.44
  4. Step 4: Simplify right side
    390,729.72x = 149,714,136,788.79
  5. Step 5: Solve for x
    x = 149,714,136,788.79/390,729.72
  6. Step 6: Final answer
    x = 383,165.47

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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.