Home / 684,860.30-945,135.05-378,931.70

Finding the Fourth Proportional to 684,860.30, 945,135.05 and 378,931.70

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Solution

The fourth proportional to 684,860.30, 945,135.05 and 378,931.70 is: 522,941.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,860.30 : 945,135.05 = 378,931.70 : x
  2. Step 2: Convert to fraction form
    684,860.30/945,135.05 = 378,931.70/x
  3. Step 3: Cross multiply
    684,860.30x = 945,135.05 × 378,931.70
  4. Step 4: Simplify right side
    684,860.30x = 358,141,624,605.75
  5. Step 5: Solve for x
    x = 358,141,624,605.75/684,860.30
  6. Step 6: Final answer
    x = 522,941.14

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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.