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Finding the Fourth Proportional to 315,153.40, 472,666.32 and 115,405.58

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Solution

The fourth proportional to 315,153.40, 472,666.32 and 115,405.58 is: 173,085.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,153.40 : 472,666.32 = 115,405.58 : x
  2. Step 2: Convert to fraction form
    315,153.40/472,666.32 = 115,405.58/x
  3. Step 3: Cross multiply
    315,153.40x = 472,666.32 × 115,405.58
  4. Step 4: Simplify right side
    315,153.40x = 54,548,330,806.07
  5. Step 5: Solve for x
    x = 54,548,330,806.07/315,153.40
  6. Step 6: Final answer
    x = 173,085.01

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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.