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Finding the Fourth Proportional to 398,089.69, 549,359.95 and 216,804.65

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Solution

The fourth proportional to 398,089.69, 549,359.95 and 216,804.65 is: 299,188.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,089.69 : 549,359.95 = 216,804.65 : x
  2. Step 2: Convert to fraction form
    398,089.69/549,359.95 = 216,804.65/x
  3. Step 3: Cross multiply
    398,089.69x = 549,359.95 × 216,804.65
  4. Step 4: Simplify right side
    398,089.69x = 119,103,791,683.77
  5. Step 5: Solve for x
    x = 119,103,791,683.77/398,089.69
  6. Step 6: Final answer
    x = 299,188.34

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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.