Home / 715,075.85-986,810.55-392,793.15

Finding the Fourth Proportional to 715,075.85, 986,810.55 and 392,793.15

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Solution

The fourth proportional to 715,075.85, 986,810.55 and 392,793.15 is: 542,057.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,075.85 : 986,810.55 = 392,793.15 : x
  2. Step 2: Convert to fraction form
    715,075.85/986,810.55 = 392,793.15/x
  3. Step 3: Cross multiply
    715,075.85x = 986,810.55 × 392,793.15
  4. Step 4: Simplify right side
    715,075.85x = 387,612,421,064.49
  5. Step 5: Solve for x
    x = 387,612,421,064.49/715,075.85
  6. Step 6: Final answer
    x = 542,057.77

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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.