Home / 858,612.80-1,186,302.84-644,461.76

Finding the Fourth Proportional to 858,612.80, 1,186,302.84 and 644,461.76

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Solution

The fourth proportional to 858,612.80, 1,186,302.84 and 644,461.76 is: 890,420.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,612.80 : 1,186,302.84 = 644,461.76 : x
  2. Step 2: Convert to fraction form
    858,612.80/1,186,302.84 = 644,461.76/x
  3. Step 3: Cross multiply
    858,612.80x = 1,186,302.84 × 644,461.76
  4. Step 4: Simplify right side
    858,612.80x = 764,526,816,159.40
  5. Step 5: Solve for x
    x = 764,526,816,159.40/858,612.80
  6. Step 6: Final answer
    x = 890,420.94

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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.