Home / 1,287,380,219.40-1,931,358,187.80-469,492,520.40

Finding the Fourth Proportional to 1,287,380,219.40, 1,931,358,187.80 and 469,492,520.40

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Solution

The fourth proportional to 1,287,380,219.40, 1,931,358,187.80 and 469,492,520.40 is: 704,343,759.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,380,219.40 : 1,931,358,187.80 = 469,492,520.40 : x
  2. Step 2: Convert to fraction form
    1,287,380,219.40/1,931,358,187.80 = 469,492,520.40/x
  3. Step 3: Cross multiply
    1,287,380,219.40x = 1,931,358,187.80 × 469,492,520.40
  4. Step 4: Simplify right side
    1,287,380,219.40x = 906,758,223,385,398,400
  5. Step 5: Solve for x
    x = 906,758,223,385,398,400/1,287,380,219.40
  6. Step 6: Final answer
    x = 704,343,759.30

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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.