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Finding the Fourth Proportional to 859,406.40, 1,289,570.40 and 360,820.80

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Solution

The fourth proportional to 859,406.40, 1,289,570.40 and 360,820.80 is: 541,424.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,406.40 : 1,289,570.40 = 360,820.80 : x
  2. Step 2: Convert to fraction form
    859,406.40/1,289,570.40 = 360,820.80/x
  3. Step 3: Cross multiply
    859,406.40x = 1,289,570.40 × 360,820.80
  4. Step 4: Simplify right side
    859,406.40x = 465,303,823,384.32
  5. Step 5: Solve for x
    x = 465,303,823,384.32/859,406.40
  6. Step 6: Final answer
    x = 541,424.67

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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.