Home / 639,421.20-882,396.45-352,941.21

Finding the Fourth Proportional to 639,421.20, 882,396.45 and 352,941.21

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Solution

The fourth proportional to 639,421.20, 882,396.45 and 352,941.21 is: 487,056.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,421.20 : 882,396.45 = 352,941.21 : x
  2. Step 2: Convert to fraction form
    639,421.20/882,396.45 = 352,941.21/x
  3. Step 3: Cross multiply
    639,421.20x = 882,396.45 × 352,941.21
  4. Step 4: Simplify right side
    639,421.20x = 311,434,070,762.71
  5. Step 5: Solve for x
    x = 311,434,070,762.71/639,421.20
  6. Step 6: Final answer
    x = 487,056.22

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1.5x scale

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.