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Finding the Fourth Proportional to 315,030.64, 472,481.52 and 90,330.88

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Solution

The fourth proportional to 315,030.64, 472,481.52 and 90,330.88 is: 135,477.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,030.64 : 472,481.52 = 90,330.88 : x
  2. Step 2: Convert to fraction form
    315,030.64/472,481.52 = 90,330.88/x
  3. Step 3: Cross multiply
    315,030.64x = 472,481.52 × 90,330.88
  4. Step 4: Simplify right side
    315,030.64x = 42,679,671,485.34
  5. Step 5: Solve for x
    x = 42,679,671,485.34/315,030.64
  6. Step 6: Final answer
    x = 135,477.84

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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.