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Finding the Fourth Proportional to 858,779.70, 1,288,169.55 and 699,347.40

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Solution

The fourth proportional to 858,779.70, 1,288,169.55 and 699,347.40 is: 1,049,021.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,779.70 : 1,288,169.55 = 699,347.40 : x
  2. Step 2: Convert to fraction form
    858,779.70/1,288,169.55 = 699,347.40/x
  3. Step 3: Cross multiply
    858,779.70x = 1,288,169.55 × 699,347.40
  4. Step 4: Simplify right side
    858,779.70x = 900,878,025,551.67
  5. Step 5: Solve for x
    x = 900,878,025,551.67/858,779.70
  6. Step 6: Final answer
    x = 1,049,021.10

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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.