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Finding the Fourth Proportional to 642,259.84, 886,306.98 and 355,779.04

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Solution

The fourth proportional to 642,259.84, 886,306.98 and 355,779.04 is: 490,968.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,259.84 : 886,306.98 = 355,779.04 : x
  2. Step 2: Convert to fraction form
    642,259.84/886,306.98 = 355,779.04/x
  3. Step 3: Cross multiply
    642,259.84x = 886,306.98 × 355,779.04
  4. Step 4: Simplify right side
    642,259.84x = 315,329,446,489.70
  5. Step 5: Solve for x
    x = 315,329,446,489.70/642,259.84
  6. Step 6: Final answer
    x = 490,968.65

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1.5x scale

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.