Home / 1,187,389.40-1,780,911.30-345,853.40

Finding the Fourth Proportional to 1,187,389.40, 1,780,911.30 and 345,853.40

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Solution

The fourth proportional to 1,187,389.40, 1,780,911.30 and 345,853.40 is: 518,729.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,389.40 : 1,780,911.30 = 345,853.40 : x
  2. Step 2: Convert to fraction form
    1,187,389.40/1,780,911.30 = 345,853.40/x
  3. Step 3: Cross multiply
    1,187,389.40x = 1,780,911.30 × 345,853.40
  4. Step 4: Simplify right side
    1,187,389.40x = 615,934,228,203.42
  5. Step 5: Solve for x
    x = 615,934,228,203.42/1,187,389.40
  6. Step 6: Final answer
    x = 518,729.77

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Double scale
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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.