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Finding the Fourth Proportional to 315,065.16, 472,455.56 and 90,374.60

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Solution

The fourth proportional to 315,065.16, 472,455.56 and 90,374.60 is: 135,521.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,065.16 : 472,455.56 = 90,374.60 : x
  2. Step 2: Convert to fraction form
    315,065.16/472,455.56 = 90,374.60/x
  3. Step 3: Cross multiply
    315,065.16x = 472,455.56 × 90,374.60
  4. Step 4: Simplify right side
    315,065.16x = 42,697,982,252.78
  5. Step 5: Solve for x
    x = 42,697,982,252.78/315,065.16
  6. Step 6: Final answer
    x = 135,521.12

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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.