Home / 678,667.20-1,018,000.80-620,930.40

Finding the Fourth Proportional to 678,667.20, 1,018,000.80 and 620,930.40

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Solution

The fourth proportional to 678,667.20, 1,018,000.80 and 620,930.40 is: 931,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,667.20 : 1,018,000.80 = 620,930.40 : x
  2. Step 2: Convert to fraction form
    678,667.20/1,018,000.80 = 620,930.40/x
  3. Step 3: Cross multiply
    678,667.20x = 1,018,000.80 × 620,930.40
  4. Step 4: Simplify right side
    678,667.20x = 632,107,643,944.32
  5. Step 5: Solve for x
    x = 632,107,643,944.32/678,667.20
  6. Step 6: Final answer
    x = 931,395.60

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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.