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Finding the Fourth Proportional to 685,899.60, 946,599.59 and 380,071.90

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Solution

The fourth proportional to 685,899.60, 946,599.59 and 380,071.90 is: 524,531.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,899.60 : 946,599.59 = 380,071.90 : x
  2. Step 2: Convert to fraction form
    685,899.60/946,599.59 = 380,071.90/x
  3. Step 3: Cross multiply
    685,899.60x = 946,599.59 × 380,071.90
  4. Step 4: Simplify right side
    685,899.60x = 359,775,904,710.52
  5. Step 5: Solve for x
    x = 359,775,904,710.52/685,899.60
  6. Step 6: Final answer
    x = 524,531.44

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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.