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Finding the Fourth Proportional to 665,055.60, 997,583.40 and 399,116.40

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Solution

The fourth proportional to 665,055.60, 997,583.40 and 399,116.40 is: 598,674.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,055.60 : 997,583.40 = 399,116.40 : x
  2. Step 2: Convert to fraction form
    665,055.60/997,583.40 = 399,116.40/x
  3. Step 3: Cross multiply
    665,055.60x = 997,583.40 × 399,116.40
  4. Step 4: Simplify right side
    665,055.60x = 398,151,895,307.76
  5. Step 5: Solve for x
    x = 398,151,895,307.76/665,055.60
  6. Step 6: Final answer
    x = 598,674.60

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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.