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Finding the Fourth Proportional to 487,038.15, 672,319.58 and 296,112.51

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Solution

The fourth proportional to 487,038.15, 672,319.58 and 296,112.51 is: 408,761.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,038.15 : 672,319.58 = 296,112.51 : x
  2. Step 2: Convert to fraction form
    487,038.15/672,319.58 = 296,112.51/x
  3. Step 3: Cross multiply
    487,038.15x = 672,319.58 × 296,112.51
  4. Step 4: Simplify right side
    487,038.15x = 199,082,236,875.38
  5. Step 5: Solve for x
    x = 199,082,236,875.38/487,038.15
  6. Step 6: Final answer
    x = 408,761.07

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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.