Home / 697,108.05-1,045,662.08-621,000.45

Finding the Fourth Proportional to 697,108.05, 1,045,662.08 and 621,000.45

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Solution

The fourth proportional to 697,108.05, 1,045,662.08 and 621,000.45 is: 931,500.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,108.05 : 1,045,662.08 = 621,000.45 : x
  2. Step 2: Convert to fraction form
    697,108.05/1,045,662.08 = 621,000.45/x
  3. Step 3: Cross multiply
    697,108.05x = 1,045,662.08 × 621,000.45
  4. Step 4: Simplify right side
    697,108.05x = 649,356,619,122.93
  5. Step 5: Solve for x
    x = 649,356,619,122.93/697,108.05
  6. Step 6: Final answer
    x = 931,500.68

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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.