Home / 786,375.60-1,178,785.80-312,428.40

Finding the Fourth Proportional to 786,375.60, 1,178,785.80 and 312,428.40

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Solution

The fourth proportional to 786,375.60, 1,178,785.80 and 312,428.40 is: 468,333.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,375.60 : 1,178,785.80 = 312,428.40 : x
  2. Step 2: Convert to fraction form
    786,375.60/1,178,785.80 = 312,428.40/x
  3. Step 3: Cross multiply
    786,375.60x = 1,178,785.80 × 312,428.40
  4. Step 4: Simplify right side
    786,375.60x = 368,286,161,436.72
  5. Step 5: Solve for x
    x = 368,286,161,436.72/786,375.60
  6. Step 6: Final answer
    x = 468,333.66

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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.