Home / 459,979.20-689,968.80-439,312.05

Finding the Fourth Proportional to 459,979.20, 689,968.80 and 439,312.05

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Solution

The fourth proportional to 459,979.20, 689,968.80 and 439,312.05 is: 658,968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,979.20 : 689,968.80 = 439,312.05 : x
  2. Step 2: Convert to fraction form
    459,979.20/689,968.80 = 439,312.05/x
  3. Step 3: Cross multiply
    459,979.20x = 689,968.80 × 439,312.05
  4. Step 4: Simplify right side
    459,979.20x = 303,111,607,964.04
  5. Step 5: Solve for x
    x = 303,111,607,964.04/459,979.20
  6. Step 6: Final answer
    x = 658,968.08

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Similar ratio
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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.