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Finding the Fourth Proportional to 651,775.20, 977,662.80 and 385,398.60

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Solution

The fourth proportional to 651,775.20, 977,662.80 and 385,398.60 is: 578,097.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,775.20 : 977,662.80 = 385,398.60 : x
  2. Step 2: Convert to fraction form
    651,775.20/977,662.80 = 385,398.60/x
  3. Step 3: Cross multiply
    651,775.20x = 977,662.80 × 385,398.60
  4. Step 4: Simplify right side
    651,775.20x = 376,789,874,392.08
  5. Step 5: Solve for x
    x = 376,789,874,392.08/651,775.20
  6. Step 6: Final answer
    x = 578,097.90

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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.