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Finding the Fourth Proportional to 265,588.62, 398,460.51 and 85,670.06

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Solution

The fourth proportional to 265,588.62, 398,460.51 and 85,670.06 is: 128,530.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,588.62 : 398,460.51 = 85,670.06 : x
  2. Step 2: Convert to fraction form
    265,588.62/398,460.51 = 85,670.06/x
  3. Step 3: Cross multiply
    265,588.62x = 398,460.51 × 85,670.06
  4. Step 4: Simplify right side
    265,588.62x = 34,136,136,928.09
  5. Step 5: Solve for x
    x = 34,136,136,928.09/265,588.62
  6. Step 6: Final answer
    x = 128,530.12

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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.