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Finding the Fourth Proportional to 718,085.04, 990,953.04 and 391,397.60

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Solution

The fourth proportional to 718,085.04, 990,953.04 and 391,397.60 is: 540,126.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,085.04 : 990,953.04 = 391,397.60 : x
  2. Step 2: Convert to fraction form
    718,085.04/990,953.04 = 391,397.60/x
  3. Step 3: Cross multiply
    718,085.04x = 990,953.04 × 391,397.60
  4. Step 4: Simplify right side
    718,085.04x = 387,856,641,568.70
  5. Step 5: Solve for x
    x = 387,856,641,568.70/718,085.04
  6. Step 6: Final answer
    x = 540,126.34

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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.