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Finding the Fourth Proportional to 520.93, 718.95 and 477.19

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Solution

The fourth proportional to 520.93, 718.95 and 477.19 is: 658.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.93 : 718.95 = 477.19 : x
  2. Step 2: Convert to fraction form
    520.93/718.95 = 477.19/x
  3. Step 3: Cross multiply
    520.93x = 718.95 × 477.19
  4. Step 4: Simplify right side
    520.93x = 343,075.75
  5. Step 5: Solve for x
    x = 343,075.75/520.93
  6. Step 6: Final answer
    x = 658.58

Related Problems

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Double scale
Find fourth proportional to 521.93, 720.33 and 478.19
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.