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Finding the Fourth Proportional to 525,065.40, 787,598.10 and 399,094.20

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Solution

The fourth proportional to 525,065.40, 787,598.10 and 399,094.20 is: 598,641.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,065.40 : 787,598.10 = 399,094.20 : x
  2. Step 2: Convert to fraction form
    525,065.40/787,598.10 = 399,094.20/x
  3. Step 3: Cross multiply
    525,065.40x = 787,598.10 × 399,094.20
  4. Step 4: Simplify right side
    525,065.40x = 314,325,833,641.02
  5. Step 5: Solve for x
    x = 314,325,833,641.02/525,065.40
  6. Step 6: Final answer
    x = 598,641.30

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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.