Home / 1,287,578.75-1,931,278.71-389,025.19

Finding the Fourth Proportional to 1,287,578.75, 1,931,278.71 and 389,025.19

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Solution

The fourth proportional to 1,287,578.75, 1,931,278.71 and 389,025.19 is: 583,510.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,578.75 : 1,931,278.71 = 389,025.19 : x
  2. Step 2: Convert to fraction form
    1,287,578.75/1,931,278.71 = 389,025.19/x
  3. Step 3: Cross multiply
    1,287,578.75x = 1,931,278.71 × 389,025.19
  4. Step 4: Simplify right side
    1,287,578.75x = 751,316,070,973.65
  5. Step 5: Solve for x
    x = 751,316,070,973.65/1,287,578.75
  6. Step 6: Final answer
    x = 583,510.77

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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.