Home / 686,518.23-947,451.10-380,690.51

Finding the Fourth Proportional to 686,518.23, 947,451.10 and 380,690.51

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Solution

The fourth proportional to 686,518.23, 947,451.10 and 380,690.51 is: 525,383.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,518.23 : 947,451.10 = 380,690.51 : x
  2. Step 2: Convert to fraction form
    686,518.23/947,451.10 = 380,690.51/x
  3. Step 3: Cross multiply
    686,518.23x = 947,451.10 × 380,690.51
  4. Step 4: Simplify right side
    686,518.23x = 360,685,642,459.06
  5. Step 5: Solve for x
    x = 360,685,642,459.06/686,518.23
  6. Step 6: Final answer
    x = 525,383.93

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Double scale
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Similar ratio
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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.