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Finding the Fourth Proportional to 680,123.40, 1,020,970.80 and 365,195.40

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Solution

The fourth proportional to 680,123.40, 1,020,970.80 and 365,195.40 is: 548,214.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,123.40 : 1,020,970.80 = 365,195.40 : x
  2. Step 2: Convert to fraction form
    680,123.40/1,020,970.80 = 365,195.40/x
  3. Step 3: Cross multiply
    680,123.40x = 1,020,970.80 × 365,195.40
  4. Step 4: Simplify right side
    680,123.40x = 372,853,839,694.32
  5. Step 5: Solve for x
    x = 372,853,839,694.32/680,123.40
  6. Step 6: Final answer
    x = 548,214.99

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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.