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Finding the Fourth Proportional to 452,186.40, 678,279.60 and 426,381.60

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Solution

The fourth proportional to 452,186.40, 678,279.60 and 426,381.60 is: 639,572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,186.40 : 678,279.60 = 426,381.60 : x
  2. Step 2: Convert to fraction form
    452,186.40/678,279.60 = 426,381.60/x
  3. Step 3: Cross multiply
    452,186.40x = 678,279.60 × 426,381.60
  4. Step 4: Simplify right side
    452,186.40x = 289,205,941,095.36
  5. Step 5: Solve for x
    x = 289,205,941,095.36/452,186.40
  6. Step 6: Final answer
    x = 639,572.40

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Similar ratio
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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.