Home / 765,869.45-1,056,890.84-421,698.15

Finding the Fourth Proportional to 765,869.45, 1,056,890.84 and 421,698.15

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Solution

The fourth proportional to 765,869.45, 1,056,890.84 and 421,698.15 is: 581,938.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,869.45 : 1,056,890.84 = 421,698.15 : x
  2. Step 2: Convert to fraction form
    765,869.45/1,056,890.84 = 421,698.15/x
  3. Step 3: Cross multiply
    765,869.45x = 1,056,890.84 × 421,698.15
  4. Step 4: Simplify right side
    765,869.45x = 445,688,909,871.46
  5. Step 5: Solve for x
    x = 445,688,909,871.46/765,869.45
  6. Step 6: Final answer
    x = 581,938.49

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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.