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Finding the Fourth Proportional to 306,932.16, 460,437.12 and 85,316.16

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Solution

The fourth proportional to 306,932.16, 460,437.12 and 85,316.16 is: 127,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,932.16 : 460,437.12 = 85,316.16 : x
  2. Step 2: Convert to fraction form
    306,932.16/460,437.12 = 85,316.16/x
  3. Step 3: Cross multiply
    306,932.16x = 460,437.12 × 85,316.16
  4. Step 4: Simplify right side
    306,932.16x = 39,282,726,999.86
  5. Step 5: Solve for x
    x = 39,282,726,999.86/306,932.16
  6. Step 6: Final answer
    x = 127,985.05

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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.