Home / 389,223.60-583,792.20-318,980.40

Finding the Fourth Proportional to 389,223.60, 583,792.20 and 318,980.40

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Solution

The fourth proportional to 389,223.60, 583,792.20 and 318,980.40 is: 478,435.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,223.60 : 583,792.20 = 318,980.40 : x
  2. Step 2: Convert to fraction form
    389,223.60/583,792.20 = 318,980.40/x
  3. Step 3: Cross multiply
    389,223.60x = 583,792.20 × 318,980.40
  4. Step 4: Simplify right side
    389,223.60x = 186,218,269,472.88
  5. Step 5: Solve for x
    x = 186,218,269,472.88/389,223.60
  6. Step 6: Final answer
    x = 478,435.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.