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Finding the Fourth Proportional to 826,640.30, 1,238,779.65 and 470,902.70

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Solution

The fourth proportional to 826,640.30, 1,238,779.65 and 470,902.70 is: 705,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,640.30 : 1,238,779.65 = 470,902.70 : x
  2. Step 2: Convert to fraction form
    826,640.30/1,238,779.65 = 470,902.70/x
  3. Step 3: Cross multiply
    826,640.30x = 1,238,779.65 × 470,902.70
  4. Step 4: Simplify right side
    826,640.30x = 583,344,681,890.06
  5. Step 5: Solve for x
    x = 583,344,681,890.06/826,640.30
  6. Step 6: Final answer
    x = 705,681.40

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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.