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Finding the Fourth Proportional to 315,531.81, 435,490.02 and 186,464.79

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Solution

The fourth proportional to 315,531.81, 435,490.02 and 186,464.79 is: 257,354.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,531.81 : 435,490.02 = 186,464.79 : x
  2. Step 2: Convert to fraction form
    315,531.81/435,490.02 = 186,464.79/x
  3. Step 3: Cross multiply
    315,531.81x = 435,490.02 × 186,464.79
  4. Step 4: Simplify right side
    315,531.81x = 81,203,555,126.40
  5. Step 5: Solve for x
    x = 81,203,555,126.40/315,531.81
  6. Step 6: Final answer
    x = 257,354.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.