Home / 1,291,907.80-1,937,861.70-393,342.40

Finding the Fourth Proportional to 1,291,907.80, 1,937,861.70 and 393,342.40

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Solution

The fourth proportional to 1,291,907.80, 1,937,861.70 and 393,342.40 is: 590,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,907.80 : 1,937,861.70 = 393,342.40 : x
  2. Step 2: Convert to fraction form
    1,291,907.80/1,937,861.70 = 393,342.40/x
  3. Step 3: Cross multiply
    1,291,907.80x = 1,937,861.70 × 393,342.40
  4. Step 4: Simplify right side
    1,291,907.80x = 762,243,171,946.08
  5. Step 5: Solve for x
    x = 762,243,171,946.08/1,291,907.80
  6. Step 6: Final answer
    x = 590,013.60

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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.