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Finding the Fourth Proportional to 570,290.02, 786,987.57 and 312,166.78

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Solution

The fourth proportional to 570,290.02, 786,987.57 and 312,166.78 is: 430,783.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,290.02 : 786,987.57 = 312,166.78 : x
  2. Step 2: Convert to fraction form
    570,290.02/786,987.57 = 312,166.78/x
  3. Step 3: Cross multiply
    570,290.02x = 786,987.57 × 312,166.78
  4. Step 4: Simplify right side
    570,290.02x = 245,671,375,626.93
  5. Step 5: Solve for x
    x = 245,671,375,626.93/570,290.02
  6. Step 6: Final answer
    x = 430,783.23

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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.