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Finding the Fourth Proportional to 1,223,726.16, 1,688,730.96 and 679,863

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Solution

The fourth proportional to 1,223,726.16, 1,688,730.96 and 679,863 is: 938,204.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,726.16 : 1,688,730.96 = 679,863 : x
  2. Step 2: Convert to fraction form
    1,223,726.16/1,688,730.96 = 679,863/x
  3. Step 3: Cross multiply
    1,223,726.16x = 1,688,730.96 × 679,863
  4. Step 4: Simplify right side
    1,223,726.16x = 1,148,105,696,658.48
  5. Step 5: Solve for x
    x = 1,148,105,696,658.48/1,223,726.16
  6. Step 6: Final answer
    x = 938,204.75

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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.