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Finding the Fourth Proportional to 388,998.30, 583,497.45 and 310,266.30

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Solution

The fourth proportional to 388,998.30, 583,497.45 and 310,266.30 is: 465,399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,998.30 : 583,497.45 = 310,266.30 : x
  2. Step 2: Convert to fraction form
    388,998.30/583,497.45 = 310,266.30/x
  3. Step 3: Cross multiply
    388,998.30x = 583,497.45 × 310,266.30
  4. Step 4: Simplify right side
    388,998.30x = 181,039,594,870.94
  5. Step 5: Solve for x
    x = 181,039,594,870.94/388,998.30
  6. Step 6: Final answer
    x = 465,399.45

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Similar ratio
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1.5x scale

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.