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Finding the Fourth Proportional to 718,308.24, 990,443.88 and 459,842.64

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Solution

The fourth proportional to 718,308.24, 990,443.88 and 459,842.64 is: 634,056.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,308.24 : 990,443.88 = 459,842.64 : x
  2. Step 2: Convert to fraction form
    718,308.24/990,443.88 = 459,842.64/x
  3. Step 3: Cross multiply
    718,308.24x = 990,443.88 × 459,842.64
  4. Step 4: Simplify right side
    718,308.24x = 455,448,328,551.04
  5. Step 5: Solve for x
    x = 455,448,328,551.04/718,308.24
  6. Step 6: Final answer
    x = 634,056.95

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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.