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Finding the Fourth Proportional to 639,916.64, 883,255.76 and 368,014.24

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Solution

The fourth proportional to 639,916.64, 883,255.76 and 368,014.24 is: 507,957.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,916.64 : 883,255.76 = 368,014.24 : x
  2. Step 2: Convert to fraction form
    639,916.64/883,255.76 = 368,014.24/x
  3. Step 3: Cross multiply
    639,916.64x = 883,255.76 × 368,014.24
  4. Step 4: Simplify right side
    639,916.64x = 325,050,697,242.02
  5. Step 5: Solve for x
    x = 325,050,697,242.02/639,916.64
  6. Step 6: Final answer
    x = 507,957.88

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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.