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Finding the Fourth Proportional to 709,779.69, 979,510.83 and 387,503.37

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Solution

The fourth proportional to 709,779.69, 979,510.83 and 387,503.37 is: 534,762.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,779.69 : 979,510.83 = 387,503.37 : x
  2. Step 2: Convert to fraction form
    709,779.69/979,510.83 = 387,503.37/x
  3. Step 3: Cross multiply
    709,779.69x = 979,510.83 × 387,503.37
  4. Step 4: Simplify right side
    709,779.69x = 379,563,747,576.50
  5. Step 5: Solve for x
    x = 379,563,747,576.50/709,779.69
  6. Step 6: Final answer
    x = 534,762.76

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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.