Home / 430,938.65-646,406.21-131,418.35

Finding the Fourth Proportional to 430,938.65, 646,406.21 and 131,418.35

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Solution

The fourth proportional to 430,938.65, 646,406.21 and 131,418.35 is: 197,126.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,938.65 : 646,406.21 = 131,418.35 : x
  2. Step 2: Convert to fraction form
    430,938.65/646,406.21 = 131,418.35/x
  3. Step 3: Cross multiply
    430,938.65x = 646,406.21 × 131,418.35
  4. Step 4: Simplify right side
    430,938.65x = 84,949,637,547.95
  5. Step 5: Solve for x
    x = 84,949,637,547.95/430,938.65
  6. Step 6: Final answer
    x = 197,126.99

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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.