Home / 1,946.40-2,920.02-647.84

Finding the Fourth Proportional to 1,946.40, 2,920.02 and 647.84

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Solution

The fourth proportional to 1,946.40, 2,920.02 and 647.84 is: 971.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.40 : 2,920.02 = 647.84 : x
  2. Step 2: Convert to fraction form
    1,946.40/2,920.02 = 647.84/x
  3. Step 3: Cross multiply
    1,946.40x = 2,920.02 × 647.84
  4. Step 4: Simplify right side
    1,946.40x = 1,891,705.76
  5. Step 5: Solve for x
    x = 1,891,705.76/1,946.40
  6. Step 6: Final answer
    x = 971.90

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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.