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Finding the Fourth Proportional to 985,959.86, 1,478,312.85 and 417,043.40

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Solution

The fourth proportional to 985,959.86, 1,478,312.85 and 417,043.40 is: 625,299.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,959.86 : 1,478,312.85 = 417,043.40 : x
  2. Step 2: Convert to fraction form
    985,959.86/1,478,312.85 = 417,043.40/x
  3. Step 3: Cross multiply
    985,959.86x = 1,478,312.85 × 417,043.40
  4. Step 4: Simplify right side
    985,959.86x = 616,520,611,446.69
  5. Step 5: Solve for x
    x = 616,520,611,446.69/985,959.86
  6. Step 6: Final answer
    x = 625,299.91

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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.