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Finding the Fourth Proportional to 779.24, 1,075.62 and 484.76

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Solution

The fourth proportional to 779.24, 1,075.62 and 484.76 is: 669.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.24 : 1,075.62 = 484.76 : x
  2. Step 2: Convert to fraction form
    779.24/1,075.62 = 484.76/x
  3. Step 3: Cross multiply
    779.24x = 1,075.62 × 484.76
  4. Step 4: Simplify right side
    779.24x = 521,417.55
  5. Step 5: Solve for x
    x = 521,417.55/779.24
  6. Step 6: Final answer
    x = 669.14

Related Problems

Find fourth proportional to 389.62, 537.81 and 242.38
Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.