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Finding the Fourth Proportional to 684,872.94, 945,106.47 and 378,941.34

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Solution

The fourth proportional to 684,872.94, 945,106.47 and 378,941.34 is: 522,928.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,872.94 : 945,106.47 = 378,941.34 : x
  2. Step 2: Convert to fraction form
    684,872.94/945,106.47 = 378,941.34/x
  3. Step 3: Cross multiply
    684,872.94x = 945,106.47 × 378,941.34
  4. Step 4: Simplify right side
    684,872.94x = 358,139,912,184.47
  5. Step 5: Solve for x
    x = 358,139,912,184.47/684,872.94
  6. Step 6: Final answer
    x = 522,928.99

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.