Home / 1,289,442,987.40-1,929,700,376.70-772,244,606.20

Finding the Fourth Proportional to 1,289,442,987.40, 1,929,700,376.70 and 772,244,606.20

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Solution

The fourth proportional to 1,289,442,987.40, 1,929,700,376.70 and 772,244,606.20 is: 1,155,693,366.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,442,987.40 : 1,929,700,376.70 = 772,244,606.20 : x
  2. Step 2: Convert to fraction form
    1,289,442,987.40/1,929,700,376.70 = 772,244,606.20/x
  3. Step 3: Cross multiply
    1,289,442,987.40x = 1,929,700,376.70 × 772,244,606.20
  4. Step 4: Simplify right side
    1,289,442,987.40x = 1,490,200,707,488,683,264
  5. Step 5: Solve for x
    x = 1,490,200,707,488,683,264/1,289,442,987.40
  6. Step 6: Final answer
    x = 1,155,693,366.86

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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.