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Finding the Fourth Proportional to 617,279.12, 851,656.22 and 402,340.76

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Solution

The fourth proportional to 617,279.12, 851,656.22 and 402,340.76 is: 555,107.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,279.12 : 851,656.22 = 402,340.76 : x
  2. Step 2: Convert to fraction form
    617,279.12/851,656.22 = 402,340.76/x
  3. Step 3: Cross multiply
    617,279.12x = 851,656.22 × 402,340.76
  4. Step 4: Simplify right side
    617,279.12x = 342,656,010,813.53
  5. Step 5: Solve for x
    x = 342,656,010,813.53/617,279.12
  6. Step 6: Final answer
    x = 555,107.08

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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.