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Finding the Fourth Proportional to 990,144, 1,366,400.34 and 537,435

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Solution

The fourth proportional to 990,144, 1,366,400.34 and 537,435 is: 741,661.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,144 : 1,366,400.34 = 537,435 : x
  2. Step 2: Convert to fraction form
    990,144/1,366,400.34 = 537,435/x
  3. Step 3: Cross multiply
    990,144x = 1,366,400.34 × 537,435
  4. Step 4: Simplify right side
    990,144x = 734,351,366,727.90
  5. Step 5: Solve for x
    x = 734,351,366,727.90/990,144
  6. Step 6: Final answer
    x = 741,661.18

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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.