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Finding the Fourth Proportional to 405,612.52, 608,411.88 and 121,303.72

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Solution

The fourth proportional to 405,612.52, 608,411.88 and 121,303.72 is: 181,953.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,612.52 : 608,411.88 = 121,303.72 : x
  2. Step 2: Convert to fraction form
    405,612.52/608,411.88 = 121,303.72/x
  3. Step 3: Cross multiply
    405,612.52x = 608,411.88 × 121,303.72
  4. Step 4: Simplify right side
    405,612.52x = 73,802,624,336.19
  5. Step 5: Solve for x
    x = 73,802,624,336.19/405,612.52
  6. Step 6: Final answer
    x = 181,953.52

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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.