Home / 439,834.80-658,974.60-390,068.40

Finding the Fourth Proportional to 439,834.80, 658,974.60 and 390,068.40

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Solution

The fourth proportional to 439,834.80, 658,974.60 and 390,068.40 is: 584,412.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,834.80 : 658,974.60 = 390,068.40 : x
  2. Step 2: Convert to fraction form
    439,834.80/658,974.60 = 390,068.40/x
  3. Step 3: Cross multiply
    439,834.80x = 658,974.60 × 390,068.40
  4. Step 4: Simplify right side
    439,834.80x = 257,045,167,862.64
  5. Step 5: Solve for x
    x = 257,045,167,862.64/439,834.80
  6. Step 6: Final answer
    x = 584,412.98

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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.