Home / 1,287,564.90-1,931,347.35-389,145.30

Finding the Fourth Proportional to 1,287,564.90, 1,931,347.35 and 389,145.30

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Solution

The fourth proportional to 1,287,564.90, 1,931,347.35 and 389,145.30 is: 583,717.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,564.90 : 1,931,347.35 = 389,145.30 : x
  2. Step 2: Convert to fraction form
    1,287,564.90/1,931,347.35 = 389,145.30/x
  3. Step 3: Cross multiply
    1,287,564.90x = 1,931,347.35 × 389,145.30
  4. Step 4: Simplify right side
    1,287,564.90x = 751,574,743,919.96
  5. Step 5: Solve for x
    x = 751,574,743,919.96/1,287,564.90
  6. Step 6: Final answer
    x = 583,717.95

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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.