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Finding the Fourth Proportional to 686,405.12, 946,677.51 and 483,128.96

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Solution

The fourth proportional to 686,405.12, 946,677.51 and 483,128.96 is: 666,322.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,405.12 : 946,677.51 = 483,128.96 : x
  2. Step 2: Convert to fraction form
    686,405.12/946,677.51 = 483,128.96/x
  3. Step 3: Cross multiply
    686,405.12x = 946,677.51 × 483,128.96
  4. Step 4: Simplify right side
    686,405.12x = 457,367,316,128.30
  5. Step 5: Solve for x
    x = 457,367,316,128.30/686,405.12
  6. Step 6: Final answer
    x = 666,322.71

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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.