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Finding the Fourth Proportional to 691,010.88, 953,595.93 and 385,080.57

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Solution

The fourth proportional to 691,010.88, 953,595.93 and 385,080.57 is: 531,411.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,010.88 : 953,595.93 = 385,080.57 : x
  2. Step 2: Convert to fraction form
    691,010.88/953,595.93 = 385,080.57/x
  3. Step 3: Cross multiply
    691,010.88x = 953,595.93 × 385,080.57
  4. Step 4: Simplify right side
    691,010.88x = 367,211,264,274.08
  5. Step 5: Solve for x
    x = 367,211,264,274.08/691,010.88
  6. Step 6: Final answer
    x = 531,411.70

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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.