Home / 1,536.79-2,120.70-947.38

Finding the Fourth Proportional to 1,536.79, 2,120.70 and 947.38

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Solution

The fourth proportional to 1,536.79, 2,120.70 and 947.38 is: 1,307.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.79 : 2,120.70 = 947.38 : x
  2. Step 2: Convert to fraction form
    1,536.79/2,120.70 = 947.38/x
  3. Step 3: Cross multiply
    1,536.79x = 2,120.70 × 947.38
  4. Step 4: Simplify right side
    1,536.79x = 2,009,108.77
  5. Step 5: Solve for x
    x = 2,009,108.77/1,536.79
  6. Step 6: Final answer
    x = 1,307.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.