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Finding the Fourth Proportional to 570,423.18, 787,193.25 and 312,295.80

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Solution

The fourth proportional to 570,423.18, 787,193.25 and 312,295.80 is: 430,973.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,423.18 : 787,193.25 = 312,295.80 : x
  2. Step 2: Convert to fraction form
    570,423.18/787,193.25 = 312,295.80/x
  3. Step 3: Cross multiply
    570,423.18x = 787,193.25 × 312,295.80
  4. Step 4: Simplify right side
    570,423.18x = 245,837,145,763.35
  5. Step 5: Solve for x
    x = 245,837,145,763.35/570,423.18
  6. Step 6: Final answer
    x = 430,973.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.