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Finding the Fourth Proportional to 538,303.83, 742,876.13 and 308,903.12

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Solution

The fourth proportional to 538,303.83, 742,876.13 and 308,903.12 is: 426,295.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,303.83 : 742,876.13 = 308,903.12 : x
  2. Step 2: Convert to fraction form
    538,303.83/742,876.13 = 308,903.12/x
  3. Step 3: Cross multiply
    538,303.83x = 742,876.13 × 308,903.12
  4. Step 4: Simplify right side
    538,303.83x = 229,476,754,330.53
  5. Step 5: Solve for x
    x = 229,476,754,330.53/538,303.83
  6. Step 6: Final answer
    x = 426,295.97

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1.5x scale

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.