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Finding the Fourth Proportional to 1,012.38, 1,396.35 and 714.24

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Solution

The fourth proportional to 1,012.38, 1,396.35 and 714.24 is: 985.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.38 : 1,396.35 = 714.24 : x
  2. Step 2: Convert to fraction form
    1,012.38/1,396.35 = 714.24/x
  3. Step 3: Cross multiply
    1,012.38x = 1,396.35 × 714.24
  4. Step 4: Simplify right side
    1,012.38x = 997,329.02
  5. Step 5: Solve for x
    x = 997,329.02/1,012.38
  6. Step 6: Final answer
    x = 985.13

Related Problems

Find fourth proportional to 506.19, 698.18 and 357.12
Half scale
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Double scale
Find fourth proportional to 1,013.38, 1,397.73 and 715.24
Similar ratio
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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.