Home / 986,979.90-1,480,815.45-426,416.70

Finding the Fourth Proportional to 986,979.90, 1,480,815.45 and 426,416.70

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Solution

The fourth proportional to 986,979.90, 1,480,815.45 and 426,416.70 is: 639,774.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,979.90 : 1,480,815.45 = 426,416.70 : x
  2. Step 2: Convert to fraction form
    986,979.90/1,480,815.45 = 426,416.70/x
  3. Step 3: Cross multiply
    986,979.90x = 1,480,815.45 × 426,416.70
  4. Step 4: Simplify right side
    986,979.90x = 631,444,437,498.02
  5. Step 5: Solve for x
    x = 631,444,437,498.02/986,979.90
  6. Step 6: Final answer
    x = 639,774.36

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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.