Home / 1,946.70-2,918.18-647.25

Finding the Fourth Proportional to 1,946.70, 2,918.18 and 647.25

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Solution

The fourth proportional to 1,946.70, 2,918.18 and 647.25 is: 970.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.70 : 2,918.18 = 647.25 : x
  2. Step 2: Convert to fraction form
    1,946.70/2,918.18 = 647.25/x
  3. Step 3: Cross multiply
    1,946.70x = 2,918.18 × 647.25
  4. Step 4: Simplify right side
    1,946.70x = 1,888,788.77
  5. Step 5: Solve for x
    x = 1,888,788.77/1,946.70
  6. Step 6: Final answer
    x = 970.25

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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.