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Finding the Fourth Proportional to 30,277.60, 42,423.20 and 30,277.60

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Solution

The fourth proportional to 30,277.60, 42,423.20 and 30,277.60 is: 42,423.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,277.60 : 42,423.20 = 30,277.60 : x
  2. Step 2: Convert to fraction form
    30,277.60/42,423.20 = 30,277.60/x
  3. Step 3: Cross multiply
    30,277.60x = 42,423.20 × 30,277.60
  4. Step 4: Simplify right side
    30,277.60x = 1,284,472,680.32
  5. Step 5: Solve for x
    x = 1,284,472,680.32/30,277.60
  6. Step 6: Final answer
    x = 42,423.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.