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Finding the Fourth Proportional to 570,138.58, 786,807.57 and 315,513.46

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Solution

The fourth proportional to 570,138.58, 786,807.57 and 315,513.46 is: 435,417.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,138.58 : 786,807.57 = 315,513.46 : x
  2. Step 2: Convert to fraction form
    570,138.58/786,807.57 = 315,513.46/x
  3. Step 3: Cross multiply
    570,138.58x = 786,807.57 × 315,513.46
  4. Step 4: Simplify right side
    570,138.58x = 248,248,378,764.89
  5. Step 5: Solve for x
    x = 248,248,378,764.89/570,138.58
  6. Step 6: Final answer
    x = 435,417.61

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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.