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Finding the Fourth Proportional to 290,337,680.40, 435,506,520.60 and 239,319,344.40

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Solution

The fourth proportional to 290,337,680.40, 435,506,520.60 and 239,319,344.40 is: 358,979,016.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,337,680.40 : 435,506,520.60 = 239,319,344.40 : x
  2. Step 2: Convert to fraction form
    290,337,680.40/435,506,520.60 = 239,319,344.40/x
  3. Step 3: Cross multiply
    290,337,680.40x = 435,506,520.60 × 239,319,344.40
  4. Step 4: Simplify right side
    290,337,680.40x = 104,225,134,991,917,104
  5. Step 5: Solve for x
    x = 104,225,134,991,917,104/290,337,680.40
  6. Step 6: Final answer
    x = 358,979,016.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.