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Finding the Fourth Proportional to 209,389.40, 289,008.70 and 118,798.40

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Solution

The fourth proportional to 209,389.40, 289,008.70 and 118,798.40 is: 163,970.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,389.40 : 289,008.70 = 118,798.40 : x
  2. Step 2: Convert to fraction form
    209,389.40/289,008.70 = 118,798.40/x
  3. Step 3: Cross multiply
    209,389.40x = 289,008.70 × 118,798.40
  4. Step 4: Simplify right side
    209,389.40x = 34,333,769,404.04
  5. Step 5: Solve for x
    x = 34,333,769,404.04/209,389.40
  6. Step 6: Final answer
    x = 163,970.90

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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.