Home / 879,321.60-1,318,982.40-643,125.60

Finding the Fourth Proportional to 879,321.60, 1,318,982.40 and 643,125.60

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Solution

The fourth proportional to 879,321.60, 1,318,982.40 and 643,125.60 is: 964,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,321.60 : 1,318,982.40 = 643,125.60 : x
  2. Step 2: Convert to fraction form
    879,321.60/1,318,982.40 = 643,125.60/x
  3. Step 3: Cross multiply
    879,321.60x = 1,318,982.40 × 643,125.60
  4. Step 4: Simplify right side
    879,321.60x = 848,271,347,389.44
  5. Step 5: Solve for x
    x = 848,271,347,389.44/879,321.60
  6. Step 6: Final answer
    x = 964,688.40

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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.