Home / 811,528.80-1,218,291.60-512,008.80

Finding the Fourth Proportional to 811,528.80, 1,218,291.60 and 512,008.80

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Solution

The fourth proportional to 811,528.80, 1,218,291.60 and 512,008.80 is: 768,643.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,528.80 : 1,218,291.60 = 512,008.80 : x
  2. Step 2: Convert to fraction form
    811,528.80/1,218,291.60 = 512,008.80/x
  3. Step 3: Cross multiply
    811,528.80x = 1,218,291.60 × 512,008.80
  4. Step 4: Simplify right side
    811,528.80x = 623,776,020,166.08
  5. Step 5: Solve for x
    x = 623,776,020,166.08/811,528.80
  6. Step 6: Final answer
    x = 768,643.11

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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.