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Finding the Fourth Proportional to 692,767.72, 956,000.10 and 390,989.80

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Solution

The fourth proportional to 692,767.72, 956,000.10 and 390,989.80 is: 539,555.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,767.72 : 956,000.10 = 390,989.80 : x
  2. Step 2: Convert to fraction form
    692,767.72/956,000.10 = 390,989.80/x
  3. Step 3: Cross multiply
    692,767.72x = 956,000.10 × 390,989.80
  4. Step 4: Simplify right side
    692,767.72x = 373,786,287,898.98
  5. Step 5: Solve for x
    x = 373,786,287,898.98/692,767.72
  6. Step 6: Final answer
    x = 539,555.00

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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.