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Finding the Fourth Proportional to 808,728.80, 1,210,760.40 and 715,416.80

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Solution

The fourth proportional to 808,728.80, 1,210,760.40 and 715,416.80 is: 1,071,061.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,728.80 : 1,210,760.40 = 715,416.80 : x
  2. Step 2: Convert to fraction form
    808,728.80/1,210,760.40 = 715,416.80/x
  3. Step 3: Cross multiply
    808,728.80x = 1,210,760.40 × 715,416.80
  4. Step 4: Simplify right side
    808,728.80x = 866,198,330,934.72
  5. Step 5: Solve for x
    x = 866,198,330,934.72/808,728.80
  6. Step 6: Final answer
    x = 1,071,061.56

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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.