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Finding the Fourth Proportional to 1,685,742, 2,528,615.57 and 688,470

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Solution

The fourth proportional to 1,685,742, 2,528,615.57 and 688,470 is: 1,032,706.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685,742 : 2,528,615.57 = 688,470 : x
  2. Step 2: Convert to fraction form
    1,685,742/2,528,615.57 = 688,470/x
  3. Step 3: Cross multiply
    1,685,742x = 2,528,615.57 × 688,470
  4. Step 4: Simplify right side
    1,685,742x = 1,740,875,961,477.90
  5. Step 5: Solve for x
    x = 1,740,875,961,477.90/1,685,742
  6. Step 6: Final answer
    x = 1,032,706.05

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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.