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Finding the Fourth Proportional to 310,626.43, 465,940.32 and 85,987.51

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Solution

The fourth proportional to 310,626.43, 465,940.32 and 85,987.51 is: 128,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,626.43 : 465,940.32 = 85,987.51 : x
  2. Step 2: Convert to fraction form
    310,626.43/465,940.32 = 85,987.51/x
  3. Step 3: Cross multiply
    310,626.43x = 465,940.32 × 85,987.51
  4. Step 4: Simplify right side
    310,626.43x = 40,065,047,925.40
  5. Step 5: Solve for x
    x = 40,065,047,925.40/310,626.43
  6. Step 6: Final answer
    x = 128,981.45

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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.