Home / 478,021.51-716,865.09-140,972.68

Finding the Fourth Proportional to 478,021.51, 716,865.09 and 140,972.68

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Solution

The fourth proportional to 478,021.51, 716,865.09 and 140,972.68 is: 211,409.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,021.51 : 716,865.09 = 140,972.68 : x
  2. Step 2: Convert to fraction form
    478,021.51/716,865.09 = 140,972.68/x
  3. Step 3: Cross multiply
    478,021.51x = 716,865.09 × 140,972.68
  4. Step 4: Simplify right side
    478,021.51x = 101,058,392,935.74
  5. Step 5: Solve for x
    x = 101,058,392,935.74/478,021.51
  6. Step 6: Final answer
    x = 211,409.72

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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.