Home / 1,287,918.60-1,930,322.70-656,507.40

Finding the Fourth Proportional to 1,287,918.60, 1,930,322.70 and 656,507.40

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Solution

The fourth proportional to 1,287,918.60, 1,930,322.70 and 656,507.40 is: 983,968.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,918.60 : 1,930,322.70 = 656,507.40 : x
  2. Step 2: Convert to fraction form
    1,287,918.60/1,930,322.70 = 656,507.40/x
  3. Step 3: Cross multiply
    1,287,918.60x = 1,930,322.70 × 656,507.40
  4. Step 4: Simplify right side
    1,287,918.60x = 1,267,271,136,937.98
  5. Step 5: Solve for x
    x = 1,267,271,136,937.98/1,287,918.60
  6. Step 6: Final answer
    x = 983,968.35

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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.