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Finding the Fourth Proportional to 640,079.12, 883,336.02 and 368,147.08

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Solution

The fourth proportional to 640,079.12, 883,336.02 and 368,147.08 is: 508,058.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,079.12 : 883,336.02 = 368,147.08 : x
  2. Step 2: Convert to fraction form
    640,079.12/883,336.02 = 368,147.08/x
  3. Step 3: Cross multiply
    640,079.12x = 883,336.02 × 368,147.08
  4. Step 4: Simplify right side
    640,079.12x = 325,197,576,421.82
  5. Step 5: Solve for x
    x = 325,197,576,421.82/640,079.12
  6. Step 6: Final answer
    x = 508,058.40

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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.