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Finding the Fourth Proportional to 388,617.53, 536,284.10 and 216,534.81

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Solution

The fourth proportional to 388,617.53, 536,284.10 and 216,534.81 is: 298,813.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,617.53 : 536,284.10 = 216,534.81 : x
  2. Step 2: Convert to fraction form
    388,617.53/536,284.10 = 216,534.81/x
  3. Step 3: Cross multiply
    388,617.53x = 536,284.10 × 216,534.81
  4. Step 4: Simplify right side
    388,617.53x = 116,124,175,699.52
  5. Step 5: Solve for x
    x = 116,124,175,699.52/388,617.53
  6. Step 6: Final answer
    x = 298,813.53

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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.