Home / 686,888.04-947,081.70-445,082.36

Finding the Fourth Proportional to 686,888.04, 947,081.70 and 445,082.36

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Solution

The fourth proportional to 686,888.04, 947,081.70 and 445,082.36 is: 613,679.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,888.04 : 947,081.70 = 445,082.36 : x
  2. Step 2: Convert to fraction form
    686,888.04/947,081.70 = 445,082.36/x
  3. Step 3: Cross multiply
    686,888.04x = 947,081.70 × 445,082.36
  4. Step 4: Simplify right side
    686,888.04x = 421,529,358,148.81
  5. Step 5: Solve for x
    x = 421,529,358,148.81/686,888.04
  6. Step 6: Final answer
    x = 613,679.86

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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.