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Finding the Fourth Proportional to 398,235.18, 549,562.40 and 216,946.68

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Solution

The fourth proportional to 398,235.18, 549,562.40 and 216,946.68 is: 299,385.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,235.18 : 549,562.40 = 216,946.68 : x
  2. Step 2: Convert to fraction form
    398,235.18/549,562.40 = 216,946.68/x
  3. Step 3: Cross multiply
    398,235.18x = 549,562.40 × 216,946.68
  4. Step 4: Simplify right side
    398,235.18x = 119,225,738,132.83
  5. Step 5: Solve for x
    x = 119,225,738,132.83/398,235.18
  6. Step 6: Final answer
    x = 299,385.25

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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.