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Finding the Fourth Proportional to 388,774.94, 536,444.40 and 216,655.18

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Solution

The fourth proportional to 388,774.94, 536,444.40 and 216,655.18 is: 298,947.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,774.94 : 536,444.40 = 216,655.18 : x
  2. Step 2: Convert to fraction form
    388,774.94/536,444.40 = 216,655.18/x
  3. Step 3: Cross multiply
    388,774.94x = 536,444.40 × 216,655.18
  4. Step 4: Simplify right side
    388,774.94x = 116,223,457,194.06
  5. Step 5: Solve for x
    x = 116,223,457,194.06/388,774.94
  6. Step 6: Final answer
    x = 298,947.91

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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.