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Finding the Fourth Proportional to 639,818.64, 876,547.46 and 615,894.16

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Solution

The fourth proportional to 639,818.64, 876,547.46 and 615,894.16 is: 843,771.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,818.64 : 876,547.46 = 615,894.16 : x
  2. Step 2: Convert to fraction form
    639,818.64/876,547.46 = 615,894.16/x
  3. Step 3: Cross multiply
    639,818.64x = 876,547.46 × 615,894.16
  4. Step 4: Simplify right side
    639,818.64x = 539,860,461,576.83
  5. Step 5: Solve for x
    x = 539,860,461,576.83/639,818.64
  6. Step 6: Final answer
    x = 843,771.07

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.