Home / 619,417.39-855,162.47-390,171.18

Finding the Fourth Proportional to 619,417.39, 855,162.47 and 390,171.18

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Solution

The fourth proportional to 619,417.39, 855,162.47 and 390,171.18 is: 538,667.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,417.39 : 855,162.47 = 390,171.18 : x
  2. Step 2: Convert to fraction form
    619,417.39/855,162.47 = 390,171.18/x
  3. Step 3: Cross multiply
    619,417.39x = 855,162.47 × 390,171.18
  4. Step 4: Simplify right side
    619,417.39x = 333,659,749,742.02
  5. Step 5: Solve for x
    x = 333,659,749,742.02/619,417.39
  6. Step 6: Final answer
    x = 538,667.07

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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.