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Finding the Fourth Proportional to 672,519.58, 928,030.64 and 378,213.30

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Solution

The fourth proportional to 672,519.58, 928,030.64 and 378,213.30 is: 521,908.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,519.58 : 928,030.64 = 378,213.30 : x
  2. Step 2: Convert to fraction form
    672,519.58/928,030.64 = 378,213.30/x
  3. Step 3: Cross multiply
    672,519.58x = 928,030.64 × 378,213.30
  4. Step 4: Simplify right side
    672,519.58x = 350,993,528,964.45
  5. Step 5: Solve for x
    x = 350,993,528,964.45/672,519.58
  6. Step 6: Final answer
    x = 521,908.27

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Double scale
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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.