Home / 426,355.20-638,910.72-239,420.16

Finding the Fourth Proportional to 426,355.20, 638,910.72 and 239,420.16

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Solution

The fourth proportional to 426,355.20, 638,910.72 and 239,420.16 is: 358,780.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,355.20 : 638,910.72 = 239,420.16 : x
  2. Step 2: Convert to fraction form
    426,355.20/638,910.72 = 239,420.16/x
  3. Step 3: Cross multiply
    426,355.20x = 638,910.72 × 239,420.16
  4. Step 4: Simplify right side
    426,355.20x = 152,968,106,808.12
  5. Step 5: Solve for x
    x = 152,968,106,808.12/426,355.20
  6. Step 6: Final answer
    x = 358,780.91

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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.