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Finding the Fourth Proportional to 720,298.67, 994,011.82 and 398,005.94

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Solution

The fourth proportional to 720,298.67, 994,011.82 and 398,005.94 is: 549,248.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,298.67 : 994,011.82 = 398,005.94 : x
  2. Step 2: Convert to fraction form
    720,298.67/994,011.82 = 398,005.94/x
  3. Step 3: Cross multiply
    720,298.67x = 994,011.82 × 398,005.94
  4. Step 4: Simplify right side
    720,298.67x = 395,622,610,280.23
  5. Step 5: Solve for x
    x = 395,622,610,280.23/720,298.67
  6. Step 6: Final answer
    x = 549,248.01

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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.