Home / 644,431.40-966,647.10-289,615.40

Finding the Fourth Proportional to 644,431.40, 966,647.10 and 289,615.40

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Solution

The fourth proportional to 644,431.40, 966,647.10 and 289,615.40 is: 434,423.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,431.40 : 966,647.10 = 289,615.40 : x
  2. Step 2: Convert to fraction form
    644,431.40/966,647.10 = 289,615.40/x
  3. Step 3: Cross multiply
    644,431.40x = 966,647.10 × 289,615.40
  4. Step 4: Simplify right side
    644,431.40x = 279,955,886,525.34
  5. Step 5: Solve for x
    x = 279,955,886,525.34/644,431.40
  6. Step 6: Final answer
    x = 434,423.10

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Double scale
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Similar ratio
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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.