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Finding the Fourth Proportional to 651,858.60, 977,787.90 and 618,643.55

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Solution

The fourth proportional to 651,858.60, 977,787.90 and 618,643.55 is: 927,965.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,858.60 : 977,787.90 = 618,643.55 : x
  2. Step 2: Convert to fraction form
    651,858.60/977,787.90 = 618,643.55/x
  3. Step 3: Cross multiply
    651,858.60x = 977,787.90 × 618,643.55
  4. Step 4: Simplify right side
    651,858.60x = 604,902,172,714.11
  5. Step 5: Solve for x
    x = 604,902,172,714.11/651,858.60
  6. Step 6: Final answer
    x = 927,965.32

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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.