Home / 378,323,835.03-521,623,056.34-311,107,897.01

Finding the Fourth Proportional to 378,323,835.03, 521,623,056.34 and 311,107,897.01

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Solution

The fourth proportional to 378,323,835.03, 521,623,056.34 and 311,107,897.01 is: 428,947,470.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,323,835.03 : 521,623,056.34 = 311,107,897.01 : x
  2. Step 2: Convert to fraction form
    378,323,835.03/521,623,056.34 = 311,107,897.01/x
  3. Step 3: Cross multiply
    378,323,835.03x = 521,623,056.34 × 311,107,897.01
  4. Step 4: Simplify right side
    378,323,835.03x = 162,281,052,090,965,440
  5. Step 5: Solve for x
    x = 162,281,052,090,965,440/378,323,835.03
  6. Step 6: Final answer
    x = 428,947,470.57

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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.