Home / 987,316.80-1,479,938.40-388,046.40

Finding the Fourth Proportional to 987,316.80, 1,479,938.40 and 388,046.40

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Solution

The fourth proportional to 987,316.80, 1,479,938.40 and 388,046.40 is: 581,662.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,316.80 : 1,479,938.40 = 388,046.40 : x
  2. Step 2: Convert to fraction form
    987,316.80/1,479,938.40 = 388,046.40/x
  3. Step 3: Cross multiply
    987,316.80x = 1,479,938.40 × 388,046.40
  4. Step 4: Simplify right side
    987,316.80x = 574,284,768,341.76
  5. Step 5: Solve for x
    x = 574,284,768,341.76/987,316.80
  6. Step 6: Final answer
    x = 581,662.11

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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.