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Finding the Fourth Proportional to 316,406.98, 474,557.55 and 138,866.32

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Solution

The fourth proportional to 316,406.98, 474,557.55 and 138,866.32 is: 208,276.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,406.98 : 474,557.55 = 138,866.32 : x
  2. Step 2: Convert to fraction form
    316,406.98/474,557.55 = 138,866.32/x
  3. Step 3: Cross multiply
    316,406.98x = 474,557.55 × 138,866.32
  4. Step 4: Simplify right side
    316,406.98x = 65,900,060,596.72
  5. Step 5: Solve for x
    x = 65,900,060,596.72/316,406.98
  6. Step 6: Final answer
    x = 208,276.25

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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.