Home / 990,120-1,366,390.08-537,409.92

Finding the Fourth Proportional to 990,120, 1,366,390.08 and 537,409.92

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Solution

The fourth proportional to 990,120, 1,366,390.08 and 537,409.92 is: 741,638.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,120 : 1,366,390.08 = 537,409.92 : x
  2. Step 2: Convert to fraction form
    990,120/1,366,390.08 = 537,409.92/x
  3. Step 3: Cross multiply
    990,120x = 1,366,390.08 × 537,409.92
  4. Step 4: Simplify right side
    990,120x = 734,311,583,581.59
  5. Step 5: Solve for x
    x = 734,311,583,581.59/990,120
  6. Step 6: Final answer
    x = 741,638.98

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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.