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Finding the Fourth Proportional to 257,130.40, 385,695.60 and 67,590.40

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Solution

The fourth proportional to 257,130.40, 385,695.60 and 67,590.40 is: 101,385.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,130.40 : 385,695.60 = 67,590.40 : x
  2. Step 2: Convert to fraction form
    257,130.40/385,695.60 = 67,590.40/x
  3. Step 3: Cross multiply
    257,130.40x = 385,695.60 × 67,590.40
  4. Step 4: Simplify right side
    257,130.40x = 26,069,319,882.24
  5. Step 5: Solve for x
    x = 26,069,319,882.24/257,130.40
  6. Step 6: Final answer
    x = 101,385.60

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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.