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Finding the Fourth Proportional to 518,406.86, 715,416.64 and 303,526.82

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Solution

The fourth proportional to 518,406.86, 715,416.64 and 303,526.82 is: 418,875.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,406.86 : 715,416.64 = 303,526.82 : x
  2. Step 2: Convert to fraction form
    518,406.86/715,416.64 = 303,526.82/x
  3. Step 3: Cross multiply
    518,406.86x = 715,416.64 × 303,526.82
  4. Step 4: Simplify right side
    518,406.86x = 217,148,137,714.29
  5. Step 5: Solve for x
    x = 217,148,137,714.29/518,406.86
  6. Step 6: Final answer
    x = 418,875.90

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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.