Home / 1,328,729.40-1,993,385.70-430,018.20

Finding the Fourth Proportional to 1,328,729.40, 1,993,385.70 and 430,018.20

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Solution

The fourth proportional to 1,328,729.40, 1,993,385.70 and 430,018.20 is: 645,121.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,729.40 : 1,993,385.70 = 430,018.20 : x
  2. Step 2: Convert to fraction form
    1,328,729.40/1,993,385.70 = 430,018.20/x
  3. Step 3: Cross multiply
    1,328,729.40x = 1,993,385.70 × 430,018.20
  4. Step 4: Simplify right side
    1,328,729.40x = 857,192,130,619.74
  5. Step 5: Solve for x
    x = 857,192,130,619.74/1,328,729.40
  6. Step 6: Final answer
    x = 645,121.67

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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.