Home / 1,209,015.13-1,668,440.87-665,139.28

Finding the Fourth Proportional to 1,209,015.13, 1,668,440.87 and 665,139.28

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Solution

The fourth proportional to 1,209,015.13, 1,668,440.87 and 665,139.28 is: 917,892.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,015.13 : 1,668,440.87 = 665,139.28 : x
  2. Step 2: Convert to fraction form
    1,209,015.13/1,668,440.87 = 665,139.28/x
  3. Step 3: Cross multiply
    1,209,015.13x = 1,668,440.87 × 665,139.28
  4. Step 4: Simplify right side
    1,209,015.13x = 1,109,745,547,326.47
  5. Step 5: Solve for x
    x = 1,109,745,547,326.47/1,209,015.13
  6. Step 6: Final answer
    x = 917,892.20

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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.