Home / 840,378.40-1,159,693.52-500,840.48

Finding the Fourth Proportional to 840,378.40, 1,159,693.52 and 500,840.48

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Solution

The fourth proportional to 840,378.40, 1,159,693.52 and 500,840.48 is: 691,142.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,378.40 : 1,159,693.52 = 500,840.48 : x
  2. Step 2: Convert to fraction form
    840,378.40/1,159,693.52 = 500,840.48/x
  3. Step 3: Cross multiply
    840,378.40x = 1,159,693.52 × 500,840.48
  4. Step 4: Simplify right side
    840,378.40x = 580,821,459,209.69
  5. Step 5: Solve for x
    x = 580,821,459,209.69/840,378.40
  6. Step 6: Final answer
    x = 691,142.77

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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.