Home / 738,403.60-1,018,996.36-398,871.76

Finding the Fourth Proportional to 738,403.60, 1,018,996.36 and 398,871.76

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Solution

The fourth proportional to 738,403.60, 1,018,996.36 and 398,871.76 is: 550,442.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,403.60 : 1,018,996.36 = 398,871.76 : x
  2. Step 2: Convert to fraction form
    738,403.60/1,018,996.36 = 398,871.76/x
  3. Step 3: Cross multiply
    738,403.60x = 1,018,996.36 × 398,871.76
  4. Step 4: Simplify right side
    738,403.60x = 406,448,871,546.79
  5. Step 5: Solve for x
    x = 406,448,871,546.79/738,403.60
  6. Step 6: Final answer
    x = 550,442.70

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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.