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Finding the Fourth Proportional to 553,955.10, 830,932.88 and 427,779.78

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Solution

The fourth proportional to 553,955.10, 830,932.88 and 427,779.78 is: 641,669.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,955.10 : 830,932.88 = 427,779.78 : x
  2. Step 2: Convert to fraction form
    553,955.10/830,932.88 = 427,779.78/x
  3. Step 3: Cross multiply
    553,955.10x = 830,932.88 × 427,779.78
  4. Step 4: Simplify right side
    553,955.10x = 355,456,286,426.53
  5. Step 5: Solve for x
    x = 355,456,286,426.53/553,955.10
  6. Step 6: Final answer
    x = 641,669.85

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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.