Home / 431,246.80-646,985.40-384,821.20

Finding the Fourth Proportional to 431,246.80, 646,985.40 and 384,821.20

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Solution

The fourth proportional to 431,246.80, 646,985.40 and 384,821.20 is: 577,334.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,246.80 : 646,985.40 = 384,821.20 : x
  2. Step 2: Convert to fraction form
    431,246.80/646,985.40 = 384,821.20/x
  3. Step 3: Cross multiply
    431,246.80x = 646,985.40 × 384,821.20
  4. Step 4: Simplify right side
    431,246.80x = 248,973,698,010.48
  5. Step 5: Solve for x
    x = 248,973,698,010.48/431,246.80
  6. Step 6: Final answer
    x = 577,334.60

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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.