Home / 918,975.48-1,378,463.84-287,938.50

Finding the Fourth Proportional to 918,975.48, 1,378,463.84 and 287,938.50

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Solution

The fourth proportional to 918,975.48, 1,378,463.84 and 287,938.50 is: 431,907.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,975.48 : 1,378,463.84 = 287,938.50 : x
  2. Step 2: Convert to fraction form
    918,975.48/1,378,463.84 = 287,938.50/x
  3. Step 3: Cross multiply
    918,975.48x = 1,378,463.84 × 287,938.50
  4. Step 4: Simplify right side
    918,975.48x = 396,912,808,954.15
  5. Step 5: Solve for x
    x = 396,912,808,954.15/918,975.48
  6. Step 6: Final answer
    x = 431,907.94

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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.