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Finding the Fourth Proportional to 611,491.48, 916,302.06 and 256,311.88

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Solution

The fourth proportional to 611,491.48, 916,302.06 and 256,311.88 is: 384,075.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,491.48 : 916,302.06 = 256,311.88 : x
  2. Step 2: Convert to fraction form
    611,491.48/916,302.06 = 256,311.88/x
  3. Step 3: Cross multiply
    611,491.48x = 916,302.06 × 256,311.88
  4. Step 4: Simplify right side
    611,491.48x = 234,859,103,646.47
  5. Step 5: Solve for x
    x = 234,859,103,646.47/611,491.48
  6. Step 6: Final answer
    x = 384,075.84

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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.