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Finding the Fourth Proportional to 679,903.79, 938,247.64 and 373,980.15

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Solution

The fourth proportional to 679,903.79, 938,247.64 and 373,980.15 is: 516,081.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,903.79 : 938,247.64 = 373,980.15 : x
  2. Step 2: Convert to fraction form
    679,903.79/938,247.64 = 373,980.15/x
  3. Step 3: Cross multiply
    679,903.79x = 938,247.64 × 373,980.15
  4. Step 4: Simplify right side
    679,903.79x = 350,885,992,209.40
  5. Step 5: Solve for x
    x = 350,885,992,209.40/679,903.79
  6. Step 6: Final answer
    x = 516,081.83

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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.