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Finding the Fourth Proportional to 570,630, 787,493.12 and 315,981.18

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Solution

The fourth proportional to 570,630, 787,493.12 and 315,981.18 is: 436,067.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,630 : 787,493.12 = 315,981.18 : x
  2. Step 2: Convert to fraction form
    570,630/787,493.12 = 315,981.18/x
  3. Step 3: Cross multiply
    570,630x = 787,493.12 × 315,981.18
  4. Step 4: Simplify right side
    570,630x = 248,833,005,299.48
  5. Step 5: Solve for x
    x = 248,833,005,299.48/570,630
  6. Step 6: Final answer
    x = 436,067.16

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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.