Home / 1,211,132,977.80-1,817,549,772.30-521,535,136.20

Finding the Fourth Proportional to 1,211,132,977.80, 1,817,549,772.30 and 521,535,136.20

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Solution

The fourth proportional to 1,211,132,977.80, 1,817,549,772.30 and 521,535,136.20 is: 782,668,860.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,132,977.80 : 1,817,549,772.30 = 521,535,136.20 : x
  2. Step 2: Convert to fraction form
    1,211,132,977.80/1,817,549,772.30 = 521,535,136.20/x
  3. Step 3: Cross multiply
    1,211,132,977.80x = 1,817,549,772.30 × 521,535,136.20
  4. Step 4: Simplify right side
    1,211,132,977.80x = 947,916,068,046,759,424
  5. Step 5: Solve for x
    x = 947,916,068,046,759,424/1,211,132,977.80
  6. Step 6: Final answer
    x = 782,668,860.83

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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.