Home / 679,918.40-1,018,495.20-347,681.60

Finding the Fourth Proportional to 679,918.40, 1,018,495.20 and 347,681.60

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Solution

The fourth proportional to 679,918.40, 1,018,495.20 and 347,681.60 is: 520,815.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,918.40 : 1,018,495.20 = 347,681.60 : x
  2. Step 2: Convert to fraction form
    679,918.40/1,018,495.20 = 347,681.60/x
  3. Step 3: Cross multiply
    679,918.40x = 1,018,495.20 × 347,681.60
  4. Step 4: Simplify right side
    679,918.40x = 354,112,040,728.32
  5. Step 5: Solve for x
    x = 354,112,040,728.32/679,918.40
  6. Step 6: Final answer
    x = 520,815.50

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1.5x scale

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.