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Finding the Fourth Proportional to 807,515.70, 1,209,779.10 and 470,717.70

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Solution

The fourth proportional to 807,515.70, 1,209,779.10 and 470,717.70 is: 705,205.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,515.70 : 1,209,779.10 = 470,717.70 : x
  2. Step 2: Convert to fraction form
    807,515.70/1,209,779.10 = 470,717.70/x
  3. Step 3: Cross multiply
    807,515.70x = 1,209,779.10 × 470,717.70
  4. Step 4: Simplify right side
    807,515.70x = 569,464,435,460.07
  5. Step 5: Solve for x
    x = 569,464,435,460.07/807,515.70
  6. Step 6: Final answer
    x = 705,205.40

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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.