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Finding the Fourth Proportional to 518,607, 778,216.68 and 219,068.19

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Solution

The fourth proportional to 518,607, 778,216.68 and 219,068.19 is: 328,731.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,607 : 778,216.68 = 219,068.19 : x
  2. Step 2: Convert to fraction form
    518,607/778,216.68 = 219,068.19/x
  3. Step 3: Cross multiply
    518,607x = 778,216.68 × 219,068.19
  4. Step 4: Simplify right side
    518,607x = 170,482,519,515.41
  5. Step 5: Solve for x
    x = 170,482,519,515.41/518,607
  6. Step 6: Final answer
    x = 328,731.62

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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.