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Finding the Fourth Proportional to 518,731.12, 778,088.94 and 316,386.64

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Solution

The fourth proportional to 518,731.12, 778,088.94 and 316,386.64 is: 474,575.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,731.12 : 778,088.94 = 316,386.64 : x
  2. Step 2: Convert to fraction form
    518,731.12/778,088.94 = 316,386.64/x
  3. Step 3: Cross multiply
    518,731.12x = 778,088.94 × 316,386.64
  4. Step 4: Simplify right side
    518,731.12x = 246,176,945,347.76
  5. Step 5: Solve for x
    x = 246,176,945,347.76/518,731.12
  6. Step 6: Final answer
    x = 474,575.24

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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.