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Finding the Fourth Proportional to 315,036.64, 472,490.52 and 90,336.88

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Solution

The fourth proportional to 315,036.64, 472,490.52 and 90,336.88 is: 135,486.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,036.64 : 472,490.52 = 90,336.88 : x
  2. Step 2: Convert to fraction form
    315,036.64/472,490.52 = 90,336.88/x
  3. Step 3: Cross multiply
    315,036.64x = 472,490.52 × 90,336.88
  4. Step 4: Simplify right side
    315,036.64x = 42,683,319,406.38
  5. Step 5: Solve for x
    x = 42,683,319,406.38/315,036.64
  6. Step 6: Final answer
    x = 135,486.84

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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.