Home / 382,985.72-528,440.18-221,831.16

Finding the Fourth Proportional to 382,985.72, 528,440.18 and 221,831.16

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Solution

The fourth proportional to 382,985.72, 528,440.18 and 221,831.16 is: 306,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,985.72 : 528,440.18 = 221,831.16 : x
  2. Step 2: Convert to fraction form
    382,985.72/528,440.18 = 221,831.16/x
  3. Step 3: Cross multiply
    382,985.72x = 528,440.18 × 221,831.16
  4. Step 4: Simplify right side
    382,985.72x = 117,224,497,010.85
  5. Step 5: Solve for x
    x = 117,224,497,010.85/382,985.72
  6. Step 6: Final answer
    x = 306,080.60

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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.