Home / 387,931.89-581,873.65-185,671.65

Finding the Fourth Proportional to 387,931.89, 581,873.65 and 185,671.65

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Solution

The fourth proportional to 387,931.89, 581,873.65 and 185,671.65 is: 278,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,931.89 : 581,873.65 = 185,671.65 : x
  2. Step 2: Convert to fraction form
    387,931.89/581,873.65 = 185,671.65/x
  3. Step 3: Cross multiply
    387,931.89x = 581,873.65 × 185,671.65
  4. Step 4: Simplify right side
    387,931.89x = 108,037,440,687.02
  5. Step 5: Solve for x
    x = 108,037,440,687.02/387,931.89
  6. Step 6: Final answer
    x = 278,495.90

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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.