Home / 426,421.20-639,630.54-173,642.16

Finding the Fourth Proportional to 426,421.20, 639,630.54 and 173,642.16

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Solution

The fourth proportional to 426,421.20, 639,630.54 and 173,642.16 is: 260,462.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,421.20 : 639,630.54 = 173,642.16 : x
  2. Step 2: Convert to fraction form
    426,421.20/639,630.54 = 173,642.16/x
  3. Step 3: Cross multiply
    426,421.20x = 639,630.54 × 173,642.16
  4. Step 4: Simplify right side
    426,421.20x = 111,066,828,567.57
  5. Step 5: Solve for x
    x = 111,066,828,567.57/426,421.20
  6. Step 6: Final answer
    x = 260,462.73

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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.