Home / 678,886.20-1,018,985.40-413,165.70

Finding the Fourth Proportional to 678,886.20, 1,018,985.40 and 413,165.70

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Solution

The fourth proportional to 678,886.20, 1,018,985.40 and 413,165.70 is: 620,147.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,886.20 : 1,018,985.40 = 413,165.70 : x
  2. Step 2: Convert to fraction form
    678,886.20/1,018,985.40 = 413,165.70/x
  3. Step 3: Cross multiply
    678,886.20x = 1,018,985.40 × 413,165.70
  4. Step 4: Simplify right side
    678,886.20x = 421,009,816,080.78
  5. Step 5: Solve for x
    x = 421,009,816,080.78/678,886.20
  6. Step 6: Final answer
    x = 620,147.85

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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.