Home / 1,189,502.40-1,641,514.95-645,638.30

Finding the Fourth Proportional to 1,189,502.40, 1,641,514.95 and 645,638.30

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Solution

The fourth proportional to 1,189,502.40, 1,641,514.95 and 645,638.30 is: 890,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,502.40 : 1,641,514.95 = 645,638.30 : x
  2. Step 2: Convert to fraction form
    1,189,502.40/1,641,514.95 = 645,638.30/x
  3. Step 3: Cross multiply
    1,189,502.40x = 1,641,514.95 × 645,638.30
  4. Step 4: Simplify right side
    1,189,502.40x = 1,059,824,913,535.01
  5. Step 5: Solve for x
    x = 1,059,824,913,535.01/1,189,502.40
  6. Step 6: Final answer
    x = 890,981.74

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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.