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Finding the Fourth Proportional to 581,390.40, 872,085.60 and 413,428.80

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Solution

The fourth proportional to 581,390.40, 872,085.60 and 413,428.80 is: 620,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,390.40 : 872,085.60 = 413,428.80 : x
  2. Step 2: Convert to fraction form
    581,390.40/872,085.60 = 413,428.80/x
  3. Step 3: Cross multiply
    581,390.40x = 872,085.60 × 413,428.80
  4. Step 4: Simplify right side
    581,390.40x = 360,545,303,105.28
  5. Step 5: Solve for x
    x = 360,545,303,105.28/581,390.40
  6. Step 6: Final answer
    x = 620,143.20

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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.