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Finding the Fourth Proportional to 718,840.32, 992,318.48 and 464,315.64

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Solution

The fourth proportional to 718,840.32, 992,318.48 and 464,315.64 is: 640,961.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,840.32 : 992,318.48 = 464,315.64 : x
  2. Step 2: Convert to fraction form
    718,840.32/992,318.48 = 464,315.64/x
  3. Step 3: Cross multiply
    718,840.32x = 992,318.48 × 464,315.64
  4. Step 4: Simplify right side
    718,840.32x = 460,748,990,125.03
  5. Step 5: Solve for x
    x = 460,748,990,125.03/718,840.32
  6. Step 6: Final answer
    x = 640,961.53

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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.