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Finding the Fourth Proportional to 351,978.40, 528,066.01 and 115,487.15

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Solution

The fourth proportional to 351,978.40, 528,066.01 and 115,487.15 is: 173,263.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,978.40 : 528,066.01 = 115,487.15 : x
  2. Step 2: Convert to fraction form
    351,978.40/528,066.01 = 115,487.15/x
  3. Step 3: Cross multiply
    351,978.40x = 528,066.01 × 115,487.15
  4. Step 4: Simplify right side
    351,978.40x = 60,984,838,506.77
  5. Step 5: Solve for x
    x = 60,984,838,506.77/351,978.40
  6. Step 6: Final answer
    x = 173,263.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.