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Finding the Fourth Proportional to 472,315.12, 707,685.16 and 338,995.60

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Solution

The fourth proportional to 472,315.12, 707,685.16 and 338,995.60 is: 507,928.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,315.12 : 707,685.16 = 338,995.60 : x
  2. Step 2: Convert to fraction form
    472,315.12/707,685.16 = 338,995.60/x
  3. Step 3: Cross multiply
    472,315.12x = 707,685.16 × 338,995.60
  4. Step 4: Simplify right side
    472,315.12x = 239,902,155,425.30
  5. Step 5: Solve for x
    x = 239,902,155,425.30/472,315.12
  6. Step 6: Final answer
    x = 507,928.17

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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.