Home / 785,615.76-1,178,940.24-430,878.78

Finding the Fourth Proportional to 785,615.76, 1,178,940.24 and 430,878.78

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Solution

The fourth proportional to 785,615.76, 1,178,940.24 and 430,878.78 is: 646,601.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,615.76 : 1,178,940.24 = 430,878.78 : x
  2. Step 2: Convert to fraction form
    785,615.76/1,178,940.24 = 430,878.78/x
  3. Step 3: Cross multiply
    785,615.76x = 1,178,940.24 × 430,878.78
  4. Step 4: Simplify right side
    785,615.76x = 507,980,332,304.11
  5. Step 5: Solve for x
    x = 507,980,332,304.11/785,615.76
  6. Step 6: Final answer
    x = 646,601.50

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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.