Home / 426,300.10-639,389.67-145,776.58

Finding the Fourth Proportional to 426,300.10, 639,389.67 and 145,776.58

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Solution

The fourth proportional to 426,300.10, 639,389.67 and 145,776.58 is: 218,644.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,300.10 : 639,389.67 = 145,776.58 : x
  2. Step 2: Convert to fraction form
    426,300.10/639,389.67 = 145,776.58/x
  3. Step 3: Cross multiply
    426,300.10x = 639,389.67 × 145,776.58
  4. Step 4: Simplify right side
    426,300.10x = 93,208,039,379.93
  5. Step 5: Solve for x
    x = 93,208,039,379.93/426,300.10
  6. Step 6: Final answer
    x = 218,644.19

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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.