Home / 717,783.24-990,540.72-395,492.40

Finding the Fourth Proportional to 717,783.24, 990,540.72 and 395,492.40

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Solution

The fourth proportional to 717,783.24, 990,540.72 and 395,492.40 is: 545,779.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,783.24 : 990,540.72 = 395,492.40 : x
  2. Step 2: Convert to fraction form
    717,783.24/990,540.72 = 395,492.40/x
  3. Step 3: Cross multiply
    717,783.24x = 990,540.72 × 395,492.40
  4. Step 4: Simplify right side
    717,783.24x = 391,751,326,650.53
  5. Step 5: Solve for x
    x = 391,751,326,650.53/717,783.24
  6. Step 6: Final answer
    x = 545,779.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.