Home / 430,111.78-645,081.06-408,772.18

Finding the Fourth Proportional to 430,111.78, 645,081.06 and 408,772.18

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Solution

The fourth proportional to 430,111.78, 645,081.06 and 408,772.18 is: 613,075.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,111.78 : 645,081.06 = 408,772.18 : x
  2. Step 2: Convert to fraction form
    430,111.78/645,081.06 = 408,772.18/x
  3. Step 3: Cross multiply
    430,111.78x = 645,081.06 × 408,772.18
  4. Step 4: Simplify right side
    430,111.78x = 263,691,191,172.91
  5. Step 5: Solve for x
    x = 263,691,191,172.91/430,111.78
  6. Step 6: Final answer
    x = 613,075.96

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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.