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Finding the Fourth Proportional to 309,686.40, 465,004.80 and 169,718.40

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Solution

The fourth proportional to 309,686.40, 465,004.80 and 169,718.40 is: 254,838.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,686.40 : 465,004.80 = 169,718.40 : x
  2. Step 2: Convert to fraction form
    309,686.40/465,004.80 = 169,718.40/x
  3. Step 3: Cross multiply
    309,686.40x = 465,004.80 × 169,718.40
  4. Step 4: Simplify right side
    309,686.40x = 78,919,870,648.32
  5. Step 5: Solve for x
    x = 78,919,870,648.32/309,686.40
  6. Step 6: Final answer
    x = 254,838.03

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1.5x scale

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.