Home / 426,795.48-639,681.84-198,783.72

Finding the Fourth Proportional to 426,795.48, 639,681.84 and 198,783.72

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Solution

The fourth proportional to 426,795.48, 639,681.84 and 198,783.72 is: 297,937.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,795.48 : 639,681.84 = 198,783.72 : x
  2. Step 2: Convert to fraction form
    426,795.48/639,681.84 = 198,783.72/x
  3. Step 3: Cross multiply
    426,795.48x = 639,681.84 × 198,783.72
  4. Step 4: Simplify right side
    426,795.48x = 127,158,335,771.65
  5. Step 5: Solve for x
    x = 127,158,335,771.65/426,795.48
  6. Step 6: Final answer
    x = 297,937.40

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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.