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Finding the Fourth Proportional to 715,689.54, 986,609.16 and 500,159.88

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Solution

The fourth proportional to 715,689.54, 986,609.16 and 500,159.88 is: 689,492.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,689.54 : 986,609.16 = 500,159.88 : x
  2. Step 2: Convert to fraction form
    715,689.54/986,609.16 = 500,159.88/x
  3. Step 3: Cross multiply
    715,689.54x = 986,609.16 × 500,159.88
  4. Step 4: Simplify right side
    715,689.54x = 493,462,319,072.50
  5. Step 5: Solve for x
    x = 493,462,319,072.50/715,689.54
  6. Step 6: Final answer
    x = 689,492.15

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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.