Home / 1,319,330.10-1,978,995.15-420,837.60

Finding the Fourth Proportional to 1,319,330.10, 1,978,995.15 and 420,837.60

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Solution

The fourth proportional to 1,319,330.10, 1,978,995.15 and 420,837.60 is: 631,256.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,330.10 : 1,978,995.15 = 420,837.60 : x
  2. Step 2: Convert to fraction form
    1,319,330.10/1,978,995.15 = 420,837.60/x
  3. Step 3: Cross multiply
    1,319,330.10x = 1,978,995.15 × 420,837.60
  4. Step 4: Simplify right side
    1,319,330.10x = 832,835,569,337.64
  5. Step 5: Solve for x
    x = 832,835,569,337.64/1,319,330.10
  6. Step 6: Final answer
    x = 631,256.40

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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.