Home / 1,387,258.72-2,080,888.10-389,986.72

Finding the Fourth Proportional to 1,387,258.72, 2,080,888.10 and 389,986.72

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Solution

The fourth proportional to 1,387,258.72, 2,080,888.10 and 389,986.72 is: 584,980.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,258.72 : 2,080,888.10 = 389,986.72 : x
  2. Step 2: Convert to fraction form
    1,387,258.72/2,080,888.10 = 389,986.72/x
  3. Step 3: Cross multiply
    1,387,258.72x = 2,080,888.10 × 389,986.72
  4. Step 4: Simplify right side
    1,387,258.72x = 811,518,724,806.03
  5. Step 5: Solve for x
    x = 811,518,724,806.03/1,387,258.72
  6. Step 6: Final answer
    x = 584,980.09

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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.