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Finding the Fourth Proportional to 485,318.08, 728,075.52 and 185,808.40

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Solution

The fourth proportional to 485,318.08, 728,075.52 and 185,808.40 is: 278,750.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,318.08 : 728,075.52 = 185,808.40 : x
  2. Step 2: Convert to fraction form
    485,318.08/728,075.52 = 185,808.40/x
  3. Step 3: Cross multiply
    485,318.08x = 728,075.52 × 185,808.40
  4. Step 4: Simplify right side
    485,318.08x = 135,282,547,450.37
  5. Step 5: Solve for x
    x = 135,282,547,450.37/485,318.08
  6. Step 6: Final answer
    x = 278,750.27

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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.