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Finding the Fourth Proportional to 570,215.32, 786,921.86 and 315,566.60

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Solution

The fourth proportional to 570,215.32, 786,921.86 and 315,566.60 is: 435,495.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,215.32 : 786,921.86 = 315,566.60 : x
  2. Step 2: Convert to fraction form
    570,215.32/786,921.86 = 315,566.60/x
  3. Step 3: Cross multiply
    570,215.32x = 786,921.86 × 315,566.60
  4. Step 4: Simplify right side
    570,215.32x = 248,326,255,825.88
  5. Step 5: Solve for x
    x = 248,326,255,825.88/570,215.32
  6. Step 6: Final answer
    x = 435,495.59

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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.