Home / 1,209,856.40-1,816,096.80-678,415.40

Finding the Fourth Proportional to 1,209,856.40, 1,816,096.80 and 678,415.40

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Solution

The fourth proportional to 1,209,856.40, 1,816,096.80 and 678,415.40 is: 1,018,358.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,856.40 : 1,816,096.80 = 678,415.40 : x
  2. Step 2: Convert to fraction form
    1,209,856.40/1,816,096.80 = 678,415.40/x
  3. Step 3: Cross multiply
    1,209,856.40x = 1,816,096.80 × 678,415.40
  4. Step 4: Simplify right side
    1,209,856.40x = 1,232,068,037,010.72
  5. Step 5: Solve for x
    x = 1,232,068,037,010.72/1,209,856.40
  6. Step 6: Final answer
    x = 1,018,358.90

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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.