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Finding the Fourth Proportional to 610,278.40, 915,417.60 and 411,212.80

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Solution

The fourth proportional to 610,278.40, 915,417.60 and 411,212.80 is: 616,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,278.40 : 915,417.60 = 411,212.80 : x
  2. Step 2: Convert to fraction form
    610,278.40/915,417.60 = 411,212.80/x
  3. Step 3: Cross multiply
    610,278.40x = 915,417.60 × 411,212.80
  4. Step 4: Simplify right side
    610,278.40x = 376,431,434,465.28
  5. Step 5: Solve for x
    x = 376,431,434,465.28/610,278.40
  6. Step 6: Final answer
    x = 616,819.20

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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.