Home / 430,156.16-645,219.66-163,907.12

Finding the Fourth Proportional to 430,156.16, 645,219.66 and 163,907.12

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Solution

The fourth proportional to 430,156.16, 645,219.66 and 163,907.12 is: 245,855.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,156.16 : 645,219.66 = 163,907.12 : x
  2. Step 2: Convert to fraction form
    430,156.16/645,219.66 = 163,907.12/x
  3. Step 3: Cross multiply
    430,156.16x = 645,219.66 × 163,907.12
  4. Step 4: Simplify right side
    430,156.16x = 105,756,096,237.98
  5. Step 5: Solve for x
    x = 105,756,096,237.98/430,156.16
  6. Step 6: Final answer
    x = 245,855.12

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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.