Home / 1,315,197,138.48-1,814,957,586.78-712,352,763.72

Finding the Fourth Proportional to 1,315,197,138.48, 1,814,957,586.78 and 712,352,763.72

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Solution

The fourth proportional to 1,315,197,138.48, 1,814,957,586.78 and 712,352,763.72 is: 983,038,979.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,197,138.48 : 1,814,957,586.78 = 712,352,763.72 : x
  2. Step 2: Convert to fraction form
    1,315,197,138.48/1,814,957,586.78 = 712,352,763.72/x
  3. Step 3: Cross multiply
    1,315,197,138.48x = 1,814,957,586.78 × 712,352,763.72
  4. Step 4: Simplify right side
    1,315,197,138.48x = 1,292,890,052,977,314,816
  5. Step 5: Solve for x
    x = 1,292,890,052,977,314,816/1,315,197,138.48
  6. Step 6: Final answer
    x = 983,038,979.59

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.