Home / 715,655.04-987,581.93-393,364.14

Finding the Fourth Proportional to 715,655.04, 987,581.93 and 393,364.14

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Solution

The fourth proportional to 715,655.04, 987,581.93 and 393,364.14 is: 542,830.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,655.04 : 987,581.93 = 393,364.14 : x
  2. Step 2: Convert to fraction form
    715,655.04/987,581.93 = 393,364.14/x
  3. Step 3: Cross multiply
    715,655.04x = 987,581.93 × 393,364.14
  4. Step 4: Simplify right side
    715,655.04x = 388,479,316,573.99
  5. Step 5: Solve for x
    x = 388,479,316,573.99/715,655.04
  6. Step 6: Final answer
    x = 542,830.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.