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Finding the Fourth Proportional to 1,050.77, 1,450.14 and 631.11

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Solution

The fourth proportional to 1,050.77, 1,450.14 and 631.11 is: 870.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.77 : 1,450.14 = 631.11 : x
  2. Step 2: Convert to fraction form
    1,050.77/1,450.14 = 631.11/x
  3. Step 3: Cross multiply
    1,050.77x = 1,450.14 × 631.11
  4. Step 4: Simplify right side
    1,050.77x = 915,197.86
  5. Step 5: Solve for x
    x = 915,197.86/1,050.77
  6. Step 6: Final answer
    x = 870.98

Related Problems

Find fourth proportional to 525.38, 725.07 and 315.56
Half scale
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Double scale
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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.