Home / 690,128.39-1,034,842.46-315,830.63

Finding the Fourth Proportional to 690,128.39, 1,034,842.46 and 315,830.63

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Solution

The fourth proportional to 690,128.39, 1,034,842.46 and 315,830.63 is: 473,585.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,128.39 : 1,034,842.46 = 315,830.63 : x
  2. Step 2: Convert to fraction form
    690,128.39/1,034,842.46 = 315,830.63/x
  3. Step 3: Cross multiply
    690,128.39x = 1,034,842.46 × 315,830.63
  4. Step 4: Simplify right side
    690,128.39x = 326,834,939,339.18
  5. Step 5: Solve for x
    x = 326,834,939,339.18/690,128.39
  6. Step 6: Final answer
    x = 473,585.71

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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.