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Finding the Fourth Proportional to 661,760.64, 913,391.91 and 375,448.32

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Solution

The fourth proportional to 661,760.64, 913,391.91 and 375,448.32 is: 518,210.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,760.64 : 913,391.91 = 375,448.32 : x
  2. Step 2: Convert to fraction form
    661,760.64/913,391.91 = 375,448.32/x
  3. Step 3: Cross multiply
    661,760.64x = 913,391.91 × 375,448.32
  4. Step 4: Simplify right side
    661,760.64x = 342,931,458,111.09
  5. Step 5: Solve for x
    x = 342,931,458,111.09/661,760.64
  6. Step 6: Final answer
    x = 518,210.72

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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.