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Finding the Fourth Proportional to 286,308.40, 429,808.20 and 284,234.80

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Solution

The fourth proportional to 286,308.40, 429,808.20 and 284,234.80 is: 426,695.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,308.40 : 429,808.20 = 284,234.80 : x
  2. Step 2: Convert to fraction form
    286,308.40/429,808.20 = 284,234.80/x
  3. Step 3: Cross multiply
    286,308.40x = 429,808.20 × 284,234.80
  4. Step 4: Simplify right side
    286,308.40x = 122,166,447,765.36
  5. Step 5: Solve for x
    x = 122,166,447,765.36/286,308.40
  6. Step 6: Final answer
    x = 426,695.30

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1.5x scale

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.