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Finding the Fourth Proportional to 385,959.61, 531,959.28 and 256,666.98

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Solution

The fourth proportional to 385,959.61, 531,959.28 and 256,666.98 is: 353,758.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,959.61 : 531,959.28 = 256,666.98 : x
  2. Step 2: Convert to fraction form
    385,959.61/531,959.28 = 256,666.98/x
  3. Step 3: Cross multiply
    385,959.61x = 531,959.28 × 256,666.98
  4. Step 4: Simplify right side
    385,959.61x = 136,536,381,880.57
  5. Step 5: Solve for x
    x = 136,536,381,880.57/385,959.61
  6. Step 6: Final answer
    x = 353,758.21

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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.