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Finding the Fourth Proportional to 282,680.30, 390,189.72 and 180,979.67

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Solution

The fourth proportional to 282,680.30, 390,189.72 and 180,979.67 is: 249,810.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,680.30 : 390,189.72 = 180,979.67 : x
  2. Step 2: Convert to fraction form
    282,680.30/390,189.72 = 180,979.67/x
  3. Step 3: Cross multiply
    282,680.30x = 390,189.72 × 180,979.67
  4. Step 4: Simplify right side
    282,680.30x = 70,616,406,762.99
  5. Step 5: Solve for x
    x = 70,616,406,762.99/282,680.30
  6. Step 6: Final answer
    x = 249,810.15

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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.