Home / 688,144.17-1,031,051.46-421,347.60

Finding the Fourth Proportional to 688,144.17, 1,031,051.46 and 421,347.60

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Solution

The fourth proportional to 688,144.17, 1,031,051.46 and 421,347.60 is: 631,308.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,144.17 : 1,031,051.46 = 421,347.60 : x
  2. Step 2: Convert to fraction form
    688,144.17/1,031,051.46 = 421,347.60/x
  3. Step 3: Cross multiply
    688,144.17x = 1,031,051.46 × 421,347.60
  4. Step 4: Simplify right side
    688,144.17x = 434,431,058,147.50
  5. Step 5: Solve for x
    x = 434,431,058,147.50/688,144.17
  6. Step 6: Final answer
    x = 631,308.20

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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.