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Finding the Fourth Proportional to 692,243.48, 955,296.78 and 390,437.48

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Solution

The fourth proportional to 692,243.48, 955,296.78 and 390,437.48 is: 538,804.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,243.48 : 955,296.78 = 390,437.48 : x
  2. Step 2: Convert to fraction form
    692,243.48/955,296.78 = 390,437.48/x
  3. Step 3: Cross multiply
    692,243.48x = 955,296.78 × 390,437.48
  4. Step 4: Simplify right side
    692,243.48x = 372,983,667,435.31
  5. Step 5: Solve for x
    x = 372,983,667,435.31/692,243.48
  6. Step 6: Final answer
    x = 538,804.16

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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.