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Finding the Fourth Proportional to 312,386.04, 468,574.92 and 75,730.86

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Solution

The fourth proportional to 312,386.04, 468,574.92 and 75,730.86 is: 113,595.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,386.04 : 468,574.92 = 75,730.86 : x
  2. Step 2: Convert to fraction form
    312,386.04/468,574.92 = 75,730.86/x
  3. Step 3: Cross multiply
    312,386.04x = 468,574.92 × 75,730.86
  4. Step 4: Simplify right side
    312,386.04x = 35,485,581,666.03
  5. Step 5: Solve for x
    x = 35,485,581,666.03/312,386.04
  6. Step 6: Final answer
    x = 113,595.29

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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.