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Finding the Fourth Proportional to 388,416.48, 536,024.88 and 218,656.80

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Solution

The fourth proportional to 388,416.48, 536,024.88 and 218,656.80 is: 301,752.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,416.48 : 536,024.88 = 218,656.80 : x
  2. Step 2: Convert to fraction form
    388,416.48/536,024.88 = 218,656.80/x
  3. Step 3: Cross multiply
    388,416.48x = 536,024.88 × 218,656.80
  4. Step 4: Simplify right side
    388,416.48x = 117,205,484,981.18
  5. Step 5: Solve for x
    x = 117,205,484,981.18/388,416.48
  6. Step 6: Final answer
    x = 301,752.09

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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.