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Finding the Fourth Proportional to 611,676.80, 917,515.32 and 190,988.72

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Solution

The fourth proportional to 611,676.80, 917,515.32 and 190,988.72 is: 286,483.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,676.80 : 917,515.32 = 190,988.72 : x
  2. Step 2: Convert to fraction form
    611,676.80/917,515.32 = 190,988.72/x
  3. Step 3: Cross multiply
    611,676.80x = 917,515.32 × 190,988.72
  4. Step 4: Simplify right side
    611,676.80x = 175,235,076,547.19
  5. Step 5: Solve for x
    x = 175,235,076,547.19/611,676.80
  6. Step 6: Final answer
    x = 286,483.12

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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.