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Finding the Fourth Proportional to 388,276.61, 535,835.88 and 216,203.45

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Solution

The fourth proportional to 388,276.61, 535,835.88 and 216,203.45 is: 298,368.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,276.61 : 535,835.88 = 216,203.45 : x
  2. Step 2: Convert to fraction form
    388,276.61/535,835.88 = 216,203.45/x
  3. Step 3: Cross multiply
    388,276.61x = 535,835.88 × 216,203.45
  4. Step 4: Simplify right side
    388,276.61x = 115,849,563,210.61
  5. Step 5: Solve for x
    x = 115,849,563,210.61/388,276.61
  6. Step 6: Final answer
    x = 298,368.64

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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.