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Finding the Fourth Proportional to 389,225.80, 583,838.70 and 256,256.20

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Solution

The fourth proportional to 389,225.80, 583,838.70 and 256,256.20 is: 384,384.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,225.80 : 583,838.70 = 256,256.20 : x
  2. Step 2: Convert to fraction form
    389,225.80/583,838.70 = 256,256.20/x
  3. Step 3: Cross multiply
    389,225.80x = 583,838.70 × 256,256.20
  4. Step 4: Simplify right side
    389,225.80x = 149,612,286,674.94
  5. Step 5: Solve for x
    x = 149,612,286,674.94/389,225.80
  6. Step 6: Final answer
    x = 384,384.30

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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.