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Finding the Fourth Proportional to 310,290.93, 465,427.13 and 85,665.07

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Solution

The fourth proportional to 310,290.93, 465,427.13 and 85,665.07 is: 128,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,290.93 : 465,427.13 = 85,665.07 : x
  2. Step 2: Convert to fraction form
    310,290.93/465,427.13 = 85,665.07/x
  3. Step 3: Cross multiply
    310,290.93x = 465,427.13 × 85,665.07
  4. Step 4: Simplify right side
    310,290.93x = 39,870,847,671.35
  5. Step 5: Solve for x
    x = 39,870,847,671.35/310,290.93
  6. Step 6: Final answer
    x = 128,495.05

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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.