Home / 382,931.20-528,430.80-213,161.68

Finding the Fourth Proportional to 382,931.20, 528,430.80 and 213,161.68

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Solution

The fourth proportional to 382,931.20, 528,430.80 and 213,161.68 is: 294,155.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,931.20 : 528,430.80 = 213,161.68 : x
  2. Step 2: Convert to fraction form
    382,931.20/528,430.80 = 213,161.68/x
  3. Step 3: Cross multiply
    382,931.20x = 528,430.80 × 213,161.68
  4. Step 4: Simplify right side
    382,931.20x = 112,641,197,091.74
  5. Step 5: Solve for x
    x = 112,641,197,091.74/382,931.20
  6. Step 6: Final answer
    x = 294,155.18

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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.