Home / 1,121,012.60-1,681,518.90-778,528.40

Finding the Fourth Proportional to 1,121,012.60, 1,681,518.90 and 778,528.40

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Solution

The fourth proportional to 1,121,012.60, 1,681,518.90 and 778,528.40 is: 1,167,792.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,012.60 : 1,681,518.90 = 778,528.40 : x
  2. Step 2: Convert to fraction form
    1,121,012.60/1,681,518.90 = 778,528.40/x
  3. Step 3: Cross multiply
    1,121,012.60x = 1,681,518.90 × 778,528.40
  4. Step 4: Simplify right side
    1,121,012.60x = 1,309,110,218,786.76
  5. Step 5: Solve for x
    x = 1,309,110,218,786.76/1,121,012.60
  6. Step 6: Final answer
    x = 1,167,792.60

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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.