Home / 816,138.20-1,224,207.30-666,547.40

Finding the Fourth Proportional to 816,138.20, 1,224,207.30 and 666,547.40

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Solution

The fourth proportional to 816,138.20, 1,224,207.30 and 666,547.40 is: 999,821.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,138.20 : 1,224,207.30 = 666,547.40 : x
  2. Step 2: Convert to fraction form
    816,138.20/1,224,207.30 = 666,547.40/x
  3. Step 3: Cross multiply
    816,138.20x = 1,224,207.30 × 666,547.40
  4. Step 4: Simplify right side
    816,138.20x = 815,992,192,876.02
  5. Step 5: Solve for x
    x = 815,992,192,876.02/816,138.20
  6. Step 6: Final answer
    x = 999,821.10

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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.