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Finding the Fourth Proportional to 388,642.98, 536,320.12 and 211,834.91

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Solution

The fourth proportional to 388,642.98, 536,320.12 and 211,834.91 is: 292,328.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,642.98 : 536,320.12 = 211,834.91 : x
  2. Step 2: Convert to fraction form
    388,642.98/536,320.12 = 211,834.91/x
  3. Step 3: Cross multiply
    388,642.98x = 536,320.12 × 211,834.91
  4. Step 4: Simplify right side
    388,642.98x = 113,611,323,292.22
  5. Step 5: Solve for x
    x = 113,611,323,292.22/388,642.98
  6. Step 6: Final answer
    x = 292,328.25

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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.