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Finding the Fourth Proportional to 678,235.61, 935,930.23 and 402,605.03

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Solution

The fourth proportional to 678,235.61, 935,930.23 and 402,605.03 is: 555,574.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,235.61 : 935,930.23 = 402,605.03 : x
  2. Step 2: Convert to fraction form
    678,235.61/935,930.23 = 402,605.03/x
  3. Step 3: Cross multiply
    678,235.61x = 935,930.23 × 402,605.03
  4. Step 4: Simplify right side
    678,235.61x = 376,810,219,660.37
  5. Step 5: Solve for x
    x = 376,810,219,660.37/678,235.61
  6. Step 6: Final answer
    x = 555,574.22

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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.