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Finding the Fourth Proportional to 679,870.85, 938,223.65 and 373,978.57

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Solution

The fourth proportional to 679,870.85, 938,223.65 and 373,978.57 is: 516,091.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,870.85 : 938,223.65 = 373,978.57 : x
  2. Step 2: Convert to fraction form
    679,870.85/938,223.65 = 373,978.57/x
  3. Step 3: Cross multiply
    679,870.85x = 938,223.65 × 373,978.57
  4. Step 4: Simplify right side
    679,870.85x = 350,875,538,967.18
  5. Step 5: Solve for x
    x = 350,875,538,967.18/679,870.85
  6. Step 6: Final answer
    x = 516,091.46

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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.