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Finding the Fourth Proportional to 420,275.79, 579,996.86 and 239,004.27

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Solution

The fourth proportional to 420,275.79, 579,996.86 and 239,004.27 is: 329,835.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,275.79 : 579,996.86 = 239,004.27 : x
  2. Step 2: Convert to fraction form
    420,275.79/579,996.86 = 239,004.27/x
  3. Step 3: Cross multiply
    420,275.79x = 579,996.86 × 239,004.27
  4. Step 4: Simplify right side
    420,275.79x = 138,621,724,931.57
  5. Step 5: Solve for x
    x = 138,621,724,931.57/420,275.79
  6. Step 6: Final answer
    x = 329,835.14

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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.