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Finding the Fourth Proportional to 808,366.76, 1,213,347.86 and 429,286.40

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Solution

The fourth proportional to 808,366.76, 1,213,347.86 and 429,286.40 is: 644,353.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,366.76 : 1,213,347.86 = 429,286.40 : x
  2. Step 2: Convert to fraction form
    808,366.76/1,213,347.86 = 429,286.40/x
  3. Step 3: Cross multiply
    808,366.76x = 1,213,347.86 × 429,286.40
  4. Step 4: Simplify right side
    808,366.76x = 520,873,732,620.67
  5. Step 5: Solve for x
    x = 520,873,732,620.67/808,366.76
  6. Step 6: Final answer
    x = 644,353.23

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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.