Home / 1,500.21-2,070.30-837.20

Finding the Fourth Proportional to 1,500.21, 2,070.30 and 837.20

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Solution

The fourth proportional to 1,500.21, 2,070.30 and 837.20 is: 1,155.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,500.21 : 2,070.30 = 837.20 : x
  2. Step 2: Convert to fraction form
    1,500.21/2,070.30 = 837.20/x
  3. Step 3: Cross multiply
    1,500.21x = 2,070.30 × 837.20
  4. Step 4: Simplify right side
    1,500.21x = 1,733,255.16
  5. Step 5: Solve for x
    x = 1,733,255.16/1,500.21
  6. Step 6: Final answer
    x = 1,155.34

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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.