Home / 1,187,373.59-1,638,569.08-643,503.60

Finding the Fourth Proportional to 1,187,373.59, 1,638,569.08 and 643,503.60

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Solution

The fourth proportional to 1,187,373.59, 1,638,569.08 and 643,503.60 is: 888,031.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,373.59 : 1,638,569.08 = 643,503.60 : x
  2. Step 2: Convert to fraction form
    1,187,373.59/1,638,569.08 = 643,503.60/x
  3. Step 3: Cross multiply
    1,187,373.59x = 1,638,569.08 × 643,503.60
  4. Step 4: Simplify right side
    1,187,373.59x = 1,054,425,102,633.07
  5. Step 5: Solve for x
    x = 1,054,425,102,633.07/1,187,373.59
  6. Step 6: Final answer
    x = 888,031.46

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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.