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Finding the Fourth Proportional to 721,247.62, 990,109.71 and 619,095.74

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Solution

The fourth proportional to 721,247.62, 990,109.71 and 619,095.74 is: 849,878.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,247.62 : 990,109.71 = 619,095.74 : x
  2. Step 2: Convert to fraction form
    721,247.62/990,109.71 = 619,095.74/x
  3. Step 3: Cross multiply
    721,247.62x = 990,109.71 × 619,095.74
  4. Step 4: Simplify right side
    721,247.62x = 612,972,700,498.16
  5. Step 5: Solve for x
    x = 612,972,700,498.16/721,247.62
  6. Step 6: Final answer
    x = 849,878.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.