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Finding the Fourth Proportional to 310,271.06, 465,433.40 and 85,631.54

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Solution

The fourth proportional to 310,271.06, 465,433.40 and 85,631.54 is: 128,454.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,271.06 : 465,433.40 = 85,631.54 : x
  2. Step 2: Convert to fraction form
    310,271.06/465,433.40 = 85,631.54/x
  3. Step 3: Cross multiply
    310,271.06x = 465,433.40 × 85,631.54
  4. Step 4: Simplify right side
    310,271.06x = 39,855,776,054.11
  5. Step 5: Solve for x
    x = 39,855,776,054.11/310,271.06
  6. Step 6: Final answer
    x = 128,454.70

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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.