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Finding the Fourth Proportional to 388,987.09, 536,807.96 and 216,899.98

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Solution

The fourth proportional to 388,987.09, 536,807.96 and 216,899.98 is: 299,325.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,987.09 : 536,807.96 = 216,899.98 : x
  2. Step 2: Convert to fraction form
    388,987.09/536,807.96 = 216,899.98/x
  3. Step 3: Cross multiply
    388,987.09x = 536,807.96 × 216,899.98
  4. Step 4: Simplify right side
    388,987.09x = 116,433,635,787.84
  5. Step 5: Solve for x
    x = 116,433,635,787.84/388,987.09
  6. Step 6: Final answer
    x = 299,325.19

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1.5x scale

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.