Home / 678,077.40-935,678.65-406,138.31

Finding the Fourth Proportional to 678,077.40, 935,678.65 and 406,138.31

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Solution

The fourth proportional to 678,077.40, 935,678.65 and 406,138.31 is: 560,430.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,077.40 : 935,678.65 = 406,138.31 : x
  2. Step 2: Convert to fraction form
    678,077.40/935,678.65 = 406,138.31/x
  3. Step 3: Cross multiply
    678,077.40x = 935,678.65 × 406,138.31
  4. Step 4: Simplify right side
    678,077.40x = 380,014,938,905.00
  5. Step 5: Solve for x
    x = 380,014,938,905.00/678,077.40
  6. Step 6: Final answer
    x = 560,430.03

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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.