Home / 1,187,931,295.78-1,781,965,039.11-314,509,968.28

Finding the Fourth Proportional to 1,187,931,295.78, 1,781,965,039.11 and 314,509,968.28

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Solution

The fourth proportional to 1,187,931,295.78, 1,781,965,039.11 and 314,509,968.28 is: 471,782,980.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,931,295.78 : 1,781,965,039.11 = 314,509,968.28 : x
  2. Step 2: Convert to fraction form
    1,187,931,295.78/1,781,965,039.11 = 314,509,968.28/x
  3. Step 3: Cross multiply
    1,187,931,295.78x = 1,781,965,039.11 × 314,509,968.28
  4. Step 4: Simplify right side
    1,187,931,295.78x = 560,445,767,926,554,944
  5. Step 5: Solve for x
    x = 560,445,767,926,554,944/1,187,931,295.78
  6. Step 6: Final answer
    x = 471,782,980.98

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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.