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Finding the Fourth Proportional to 291,369.60, 387,770.40 and 291,369.60

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Solution

The fourth proportional to 291,369.60, 387,770.40 and 291,369.60 is: 387,770.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,369.60 : 387,770.40 = 291,369.60 : x
  2. Step 2: Convert to fraction form
    291,369.60/387,770.40 = 291,369.60/x
  3. Step 3: Cross multiply
    291,369.60x = 387,770.40 × 291,369.60
  4. Step 4: Simplify right side
    291,369.60x = 112,984,506,339.84
  5. Step 5: Solve for x
    x = 112,984,506,339.84/291,369.60
  6. Step 6: Final answer
    x = 387,770.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.