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Finding the Fourth Proportional to 309,656.69, 464,485.76 and 85,020.20

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Solution

The fourth proportional to 309,656.69, 464,485.76 and 85,020.20 is: 127,530.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,656.69 : 464,485.76 = 85,020.20 : x
  2. Step 2: Convert to fraction form
    309,656.69/464,485.76 = 85,020.20/x
  3. Step 3: Cross multiply
    309,656.69x = 464,485.76 × 85,020.20
  4. Step 4: Simplify right side
    309,656.69x = 39,490,671,525.47
  5. Step 5: Solve for x
    x = 39,490,671,525.47/309,656.69
  6. Step 6: Final answer
    x = 127,530.50

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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.