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Finding the Fourth Proportional to 710,680.80, 1,066,021.20 and 663,679.20

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Solution

The fourth proportional to 710,680.80, 1,066,021.20 and 663,679.20 is: 995,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,680.80 : 1,066,021.20 = 663,679.20 : x
  2. Step 2: Convert to fraction form
    710,680.80/1,066,021.20 = 663,679.20/x
  3. Step 3: Cross multiply
    710,680.80x = 1,066,021.20 × 663,679.20
  4. Step 4: Simplify right side
    710,680.80x = 707,496,097,199.04
  5. Step 5: Solve for x
    x = 707,496,097,199.04/710,680.80
  6. Step 6: Final answer
    x = 995,518.80

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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.