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Finding the Fourth Proportional to 309,386.81, 464,080.59 and 84,749.19

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Solution

The fourth proportional to 309,386.81, 464,080.59 and 84,749.19 is: 127,123.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,386.81 : 464,080.59 = 84,749.19 : x
  2. Step 2: Convert to fraction form
    309,386.81/464,080.59 = 84,749.19/x
  3. Step 3: Cross multiply
    309,386.81x = 464,080.59 × 84,749.19
  4. Step 4: Simplify right side
    309,386.81x = 39,330,452,039.11
  5. Step 5: Solve for x
    x = 39,330,452,039.11/309,386.81
  6. Step 6: Final answer
    x = 127,123.88

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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.