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Finding the Fourth Proportional to 630,435.70, 945,653.55 and 555,640.30

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Solution

The fourth proportional to 630,435.70, 945,653.55 and 555,640.30 is: 833,460.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,435.70 : 945,653.55 = 555,640.30 : x
  2. Step 2: Convert to fraction form
    630,435.70/945,653.55 = 555,640.30/x
  3. Step 3: Cross multiply
    630,435.70x = 945,653.55 × 555,640.30
  4. Step 4: Simplify right side
    630,435.70x = 525,443,222,218.07
  5. Step 5: Solve for x
    x = 525,443,222,218.07/630,435.70
  6. Step 6: Final answer
    x = 833,460.45

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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.