Home / 642,835.68-886,814.64-400,961.76

Finding the Fourth Proportional to 642,835.68, 886,814.64 and 400,961.76

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Solution

The fourth proportional to 642,835.68, 886,814.64 and 400,961.76 is: 553,140.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,835.68 : 886,814.64 = 400,961.76 : x
  2. Step 2: Convert to fraction form
    642,835.68/886,814.64 = 400,961.76/x
  3. Step 3: Cross multiply
    642,835.68x = 886,814.64 × 400,961.76
  4. Step 4: Simplify right side
    642,835.68x = 355,578,758,848.17
  5. Step 5: Solve for x
    x = 355,578,758,848.17/642,835.68
  6. Step 6: Final answer
    x = 553,140.98

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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.