Home / 1,118,412.80-1,677,619.20-319,720.40

Finding the Fourth Proportional to 1,118,412.80, 1,677,619.20 and 319,720.40

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Solution

The fourth proportional to 1,118,412.80, 1,677,619.20 and 319,720.40 is: 479,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118,412.80 : 1,677,619.20 = 319,720.40 : x
  2. Step 2: Convert to fraction form
    1,118,412.80/1,677,619.20 = 319,720.40/x
  3. Step 3: Cross multiply
    1,118,412.80x = 1,677,619.20 × 319,720.40
  4. Step 4: Simplify right side
    1,118,412.80x = 536,369,081,671.68
  5. Step 5: Solve for x
    x = 536,369,081,671.68/1,118,412.80
  6. Step 6: Final answer
    x = 479,580.60

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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.