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Finding the Fourth Proportional to 1,368,916.32, 1,888,894.76 and 788,027.30

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Solution

The fourth proportional to 1,368,916.32, 1,888,894.76 and 788,027.30 is: 1,087,356.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368,916.32 : 1,888,894.76 = 788,027.30 : x
  2. Step 2: Convert to fraction form
    1,368,916.32/1,888,894.76 = 788,027.30/x
  3. Step 3: Cross multiply
    1,368,916.32x = 1,888,894.76 × 788,027.30
  4. Step 4: Simplify right side
    1,368,916.32x = 1,488,500,642,030.73
  5. Step 5: Solve for x
    x = 1,488,500,642,030.73/1,368,916.32
  6. Step 6: Final answer
    x = 1,087,356.92

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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.