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Finding the Fourth Proportional to 578,111.40, 866,000.70 and 578,111.40

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Solution

The fourth proportional to 578,111.40, 866,000.70 and 578,111.40 is: 866,000.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,111.40 : 866,000.70 = 578,111.40 : x
  2. Step 2: Convert to fraction form
    578,111.40/866,000.70 = 578,111.40/x
  3. Step 3: Cross multiply
    578,111.40x = 866,000.70 × 578,111.40
  4. Step 4: Simplify right side
    578,111.40x = 500,644,877,077.98
  5. Step 5: Solve for x
    x = 500,644,877,077.98/578,111.40
  6. Step 6: Final answer
    x = 866,000.70

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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.