Home / 1,273,140.64-1,909,946.74-420,271.69

Finding the Fourth Proportional to 1,273,140.64, 1,909,946.74 and 420,271.69

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Solution

The fourth proportional to 1,273,140.64, 1,909,946.74 and 420,271.69 is: 630,485.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273,140.64 : 1,909,946.74 = 420,271.69 : x
  2. Step 2: Convert to fraction form
    1,273,140.64/1,909,946.74 = 420,271.69/x
  3. Step 3: Cross multiply
    1,273,140.64x = 1,909,946.74 × 420,271.69
  4. Step 4: Simplify right side
    1,273,140.64x = 802,696,542,773.40
  5. Step 5: Solve for x
    x = 802,696,542,773.40/1,273,140.64
  6. Step 6: Final answer
    x = 630,485.37

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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.