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Finding the Fourth Proportional to 510,312.10, 765,140.10 and 210,911.80

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Solution

The fourth proportional to 510,312.10, 765,140.10 and 210,911.80 is: 316,232.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,312.10 : 765,140.10 = 210,911.80 : x
  2. Step 2: Convert to fraction form
    510,312.10/765,140.10 = 210,911.80/x
  3. Step 3: Cross multiply
    510,312.10x = 765,140.10 × 210,911.80
  4. Step 4: Simplify right side
    510,312.10x = 161,377,075,743.18
  5. Step 5: Solve for x
    x = 161,377,075,743.18/510,312.10
  6. Step 6: Final answer
    x = 316,232.12

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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.