Home / 457,946.20-686,724.90-221,361.40

Finding the Fourth Proportional to 457,946.20, 686,724.90 and 221,361.40

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Solution

The fourth proportional to 457,946.20, 686,724.90 and 221,361.40 is: 331,948.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,946.20 : 686,724.90 = 221,361.40 : x
  2. Step 2: Convert to fraction form
    457,946.20/686,724.90 = 221,361.40/x
  3. Step 3: Cross multiply
    457,946.20x = 686,724.90 × 221,361.40
  4. Step 4: Simplify right side
    457,946.20x = 152,014,385,278.86
  5. Step 5: Solve for x
    x = 152,014,385,278.86/457,946.20
  6. Step 6: Final answer
    x = 331,948.13

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1.5x scale

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.