Home / 1,290,663.79-1,781,159.30-709,911.48

Finding the Fourth Proportional to 1,290,663.79, 1,781,159.30 and 709,911.48

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Solution

The fourth proportional to 1,290,663.79, 1,781,159.30 and 709,911.48 is: 979,701.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,663.79 : 1,781,159.30 = 709,911.48 : x
  2. Step 2: Convert to fraction form
    1,290,663.79/1,781,159.30 = 709,911.48/x
  3. Step 3: Cross multiply
    1,290,663.79x = 1,781,159.30 × 709,911.48
  4. Step 4: Simplify right side
    1,290,663.79x = 1,264,465,434,778.76
  5. Step 5: Solve for x
    x = 1,264,465,434,778.76/1,290,663.79
  6. Step 6: Final answer
    x = 979,701.64

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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.