Home / 679,421.67-1,018,549.29-379,656.87

Finding the Fourth Proportional to 679,421.67, 1,018,549.29 and 379,656.87

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Solution

The fourth proportional to 679,421.67, 1,018,549.29 and 379,656.87 is: 569,159.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,421.67 : 1,018,549.29 = 379,656.87 : x
  2. Step 2: Convert to fraction form
    679,421.67/1,018,549.29 = 379,656.87/x
  3. Step 3: Cross multiply
    679,421.67x = 1,018,549.29 × 379,656.87
  4. Step 4: Simplify right side
    679,421.67x = 386,699,235,382.12
  5. Step 5: Solve for x
    x = 386,699,235,382.12/679,421.67
  6. Step 6: Final answer
    x = 569,159.41

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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.