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Finding the Fourth Proportional to 420,356.84, 630,528.57 and 195,591.56

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Solution

The fourth proportional to 420,356.84, 630,528.57 and 195,591.56 is: 293,384.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,356.84 : 630,528.57 = 195,591.56 : x
  2. Step 2: Convert to fraction form
    420,356.84/630,528.57 = 195,591.56/x
  3. Step 3: Cross multiply
    420,356.84x = 630,528.57 × 195,591.56
  4. Step 4: Simplify right side
    420,356.84x = 123,326,066,630.87
  5. Step 5: Solve for x
    x = 123,326,066,630.87/420,356.84
  6. Step 6: Final answer
    x = 293,384.23

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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.