Home / 1,209,008.81-1,668,432.13-665,132.90

Finding the Fourth Proportional to 1,209,008.81, 1,668,432.13 and 665,132.90

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Solution

The fourth proportional to 1,209,008.81, 1,668,432.13 and 665,132.90 is: 917,883.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,008.81 : 1,668,432.13 = 665,132.90 : x
  2. Step 2: Convert to fraction form
    1,209,008.81/1,668,432.13 = 665,132.90/x
  3. Step 3: Cross multiply
    1,209,008.81x = 1,668,432.13 × 665,132.90
  4. Step 4: Simplify right side
    1,209,008.81x = 1,109,729,091,075.08
  5. Step 5: Solve for x
    x = 1,109,729,091,075.08/1,209,008.81
  6. Step 6: Final answer
    x = 917,883.38

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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.