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Finding the Fourth Proportional to 519,931.80, 779,168.70 and 413,497.80

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Solution

The fourth proportional to 519,931.80, 779,168.70 and 413,497.80 is: 619,666.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,931.80 : 779,168.70 = 413,497.80 : x
  2. Step 2: Convert to fraction form
    519,931.80/779,168.70 = 413,497.80/x
  3. Step 3: Cross multiply
    519,931.80x = 779,168.70 × 413,497.80
  4. Step 4: Simplify right side
    519,931.80x = 322,184,543,278.86
  5. Step 5: Solve for x
    x = 322,184,543,278.86/519,931.80
  6. Step 6: Final answer
    x = 619,666.93

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1.5x scale

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.