Home / 538,342.15-742,964.52-402,139.63

Finding the Fourth Proportional to 538,342.15, 742,964.52 and 402,139.63

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Solution

The fourth proportional to 538,342.15, 742,964.52 and 402,139.63 is: 554,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,342.15 : 742,964.52 = 402,139.63 : x
  2. Step 2: Convert to fraction form
    538,342.15/742,964.52 = 402,139.63/x
  3. Step 3: Cross multiply
    538,342.15x = 742,964.52 × 402,139.63
  4. Step 4: Simplify right side
    538,342.15x = 298,775,478,395.42
  5. Step 5: Solve for x
    x = 298,775,478,395.42/538,342.15
  6. Step 6: Final answer
    x = 554,991.80

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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.