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Finding the Fourth Proportional to 315,373, 473,128.64 and 118,381

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Solution

The fourth proportional to 315,373, 473,128.64 and 118,381 is: 177,597.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,373 : 473,128.64 = 118,381 : x
  2. Step 2: Convert to fraction form
    315,373/473,128.64 = 118,381/x
  3. Step 3: Cross multiply
    315,373x = 473,128.64 × 118,381
  4. Step 4: Simplify right side
    315,373x = 56,009,441,531.84
  5. Step 5: Solve for x
    x = 56,009,441,531.84/315,373
  6. Step 6: Final answer
    x = 177,597.45

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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.