Home / 685,520.04-945,904.86-430,689.72

Finding the Fourth Proportional to 685,520.04, 945,904.86 and 430,689.72

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Solution

The fourth proportional to 685,520.04, 945,904.86 and 430,689.72 is: 594,280.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,520.04 : 945,904.86 = 430,689.72 : x
  2. Step 2: Convert to fraction form
    685,520.04/945,904.86 = 430,689.72/x
  3. Step 3: Cross multiply
    685,520.04x = 945,904.86 × 430,689.72
  4. Step 4: Simplify right side
    685,520.04x = 407,391,499,300.04
  5. Step 5: Solve for x
    x = 407,391,499,300.04/685,520.04
  6. Step 6: Final answer
    x = 594,280.95

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Similar ratio
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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.