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Finding the Fourth Proportional to 405,068.40, 607,631.40 and 124,585.20

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Solution

The fourth proportional to 405,068.40, 607,631.40 and 124,585.20 is: 186,886.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,068.40 : 607,631.40 = 124,585.20 : x
  2. Step 2: Convert to fraction form
    405,068.40/607,631.40 = 124,585.20/x
  3. Step 3: Cross multiply
    405,068.40x = 607,631.40 × 124,585.20
  4. Step 4: Simplify right side
    405,068.40x = 75,701,879,495.28
  5. Step 5: Solve for x
    x = 75,701,879,495.28/405,068.40
  6. Step 6: Final answer
    x = 186,886.66

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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.