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Finding the Fourth Proportional to 875,187.90, 1,310,157.45 and 520,019.10

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Solution

The fourth proportional to 875,187.90, 1,310,157.45 and 520,019.10 is: 778,469.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,187.90 : 1,310,157.45 = 520,019.10 : x
  2. Step 2: Convert to fraction form
    875,187.90/1,310,157.45 = 520,019.10/x
  3. Step 3: Cross multiply
    875,187.90x = 1,310,157.45 × 520,019.10
  4. Step 4: Simplify right side
    875,187.90x = 681,306,898,007.30
  5. Step 5: Solve for x
    x = 681,306,898,007.30/875,187.90
  6. Step 6: Final answer
    x = 778,469.28

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1.5x scale

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.