Home / 1,319,430.60-1,979,145.90-420,938.10

Finding the Fourth Proportional to 1,319,430.60, 1,979,145.90 and 420,938.10

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Solution

The fourth proportional to 1,319,430.60, 1,979,145.90 and 420,938.10 is: 631,407.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,430.60 : 1,979,145.90 = 420,938.10 : x
  2. Step 2: Convert to fraction form
    1,319,430.60/1,979,145.90 = 420,938.10/x
  3. Step 3: Cross multiply
    1,319,430.60x = 1,979,145.90 × 420,938.10
  4. Step 4: Simplify right side
    1,319,430.60x = 833,097,914,768.79
  5. Step 5: Solve for x
    x = 833,097,914,768.79/1,319,430.60
  6. Step 6: Final answer
    x = 631,407.15

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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.