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Finding the Fourth Proportional to 520,051.40, 780,077.10 and 415,075.40

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Solution

The fourth proportional to 520,051.40, 780,077.10 and 415,075.40 is: 622,613.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,051.40 : 780,077.10 = 415,075.40 : x
  2. Step 2: Convert to fraction form
    520,051.40/780,077.10 = 415,075.40/x
  3. Step 3: Cross multiply
    520,051.40x = 780,077.10 × 415,075.40
  4. Step 4: Simplify right side
    520,051.40x = 323,790,814,313.34
  5. Step 5: Solve for x
    x = 323,790,814,313.34/520,051.40
  6. Step 6: Final answer
    x = 622,613.10

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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.