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Finding the Fourth Proportional to 219,075.70, 328,613.55 and 140,343.70

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Solution

The fourth proportional to 219,075.70, 328,613.55 and 140,343.70 is: 210,515.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,075.70 : 328,613.55 = 140,343.70 : x
  2. Step 2: Convert to fraction form
    219,075.70/328,613.55 = 140,343.70/x
  3. Step 3: Cross multiply
    219,075.70x = 328,613.55 × 140,343.70
  4. Step 4: Simplify right side
    219,075.70x = 46,118,841,477.14
  5. Step 5: Solve for x
    x = 46,118,841,477.14/219,075.70
  6. Step 6: Final answer
    x = 210,515.55

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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.