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Finding the Fourth Proportional to 388,430.76, 536,085.54 and 218,697.96

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Solution

The fourth proportional to 388,430.76, 536,085.54 and 218,697.96 is: 301,831.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,430.76 : 536,085.54 = 218,697.96 : x
  2. Step 2: Convert to fraction form
    388,430.76/536,085.54 = 218,697.96/x
  3. Step 3: Cross multiply
    388,430.76x = 536,085.54 × 218,697.96
  4. Step 4: Simplify right side
    388,430.76x = 117,240,813,983.50
  5. Step 5: Solve for x
    x = 117,240,813,983.50/388,430.76
  6. Step 6: Final answer
    x = 301,831.95

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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.