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Finding the Fourth Proportional to 677,425.98, 934,889.19 and 390,964.52

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Solution

The fourth proportional to 677,425.98, 934,889.19 and 390,964.52 is: 539,554.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,425.98 : 934,889.19 = 390,964.52 : x
  2. Step 2: Convert to fraction form
    677,425.98/934,889.19 = 390,964.52/x
  3. Step 3: Cross multiply
    677,425.98x = 934,889.19 × 390,964.52
  4. Step 4: Simplify right side
    677,425.98x = 365,508,506,491.82
  5. Step 5: Solve for x
    x = 365,508,506,491.82/677,425.98
  6. Step 6: Final answer
    x = 539,554.90

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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.