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Finding the Fourth Proportional to 708,020.70, 977,065.65 and 385,729.80

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Solution

The fourth proportional to 708,020.70, 977,065.65 and 385,729.80 is: 532,305.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,020.70 : 977,065.65 = 385,729.80 : x
  2. Step 2: Convert to fraction form
    708,020.70/977,065.65 = 385,729.80/x
  3. Step 3: Cross multiply
    708,020.70x = 977,065.65 × 385,729.80
  4. Step 4: Simplify right side
    708,020.70x = 376,883,337,761.37
  5. Step 5: Solve for x
    x = 376,883,337,761.37/708,020.70
  6. Step 6: Final answer
    x = 532,305.54

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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.