Home / 690,706.98-1,036,208.70-391,330.98

Finding the Fourth Proportional to 690,706.98, 1,036,208.70 and 391,330.98

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Solution

The fourth proportional to 690,706.98, 1,036,208.70 and 391,330.98 is: 587,080.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,706.98 : 1,036,208.70 = 391,330.98 : x
  2. Step 2: Convert to fraction form
    690,706.98/1,036,208.70 = 391,330.98/x
  3. Step 3: Cross multiply
    690,706.98x = 1,036,208.70 × 391,330.98
  4. Step 4: Simplify right side
    690,706.98x = 405,500,566,055.53
  5. Step 5: Solve for x
    x = 405,500,566,055.53/690,706.98
  6. Step 6: Final answer
    x = 587,080.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.