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Finding the Fourth Proportional to 611,555.40, 917,333.10 and 522,981.90

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Solution

The fourth proportional to 611,555.40, 917,333.10 and 522,981.90 is: 784,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,555.40 : 917,333.10 = 522,981.90 : x
  2. Step 2: Convert to fraction form
    611,555.40/917,333.10 = 522,981.90/x
  3. Step 3: Cross multiply
    611,555.40x = 917,333.10 × 522,981.90
  4. Step 4: Simplify right side
    611,555.40x = 479,748,607,570.89
  5. Step 5: Solve for x
    x = 479,748,607,570.89/611,555.40
  6. Step 6: Final answer
    x = 784,472.85

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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.