Home / 310,445.07-428,449.71-172,637.74

Finding the Fourth Proportional to 310,445.07, 428,449.71 and 172,637.74

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Solution

The fourth proportional to 310,445.07, 428,449.71 and 172,637.74 is: 238,259.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,445.07 : 428,449.71 = 172,637.74 : x
  2. Step 2: Convert to fraction form
    310,445.07/428,449.71 = 172,637.74/x
  3. Step 3: Cross multiply
    310,445.07x = 428,449.71 × 172,637.74
  4. Step 4: Simplify right side
    310,445.07x = 73,966,590,821.01
  5. Step 5: Solve for x
    x = 73,966,590,821.01/310,445.07
  6. Step 6: Final answer
    x = 238,259.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.