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Finding the Fourth Proportional to 666,404.63, 918,681.84 and 475,085.87

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Solution

The fourth proportional to 666,404.63, 918,681.84 and 475,085.87 is: 654,936.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,404.63 : 918,681.84 = 475,085.87 : x
  2. Step 2: Convert to fraction form
    666,404.63/918,681.84 = 475,085.87/x
  3. Step 3: Cross multiply
    666,404.63x = 918,681.84 × 475,085.87
  4. Step 4: Simplify right side
    666,404.63x = 436,452,756,616.19
  5. Step 5: Solve for x
    x = 436,452,756,616.19/666,404.63
  6. Step 6: Final answer
    x = 654,936.57

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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.