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Finding the Fourth Proportional to 290,339,626.80, 435,509,440.20 and 145,220,804.40

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Solution

The fourth proportional to 290,339,626.80, 435,509,440.20 and 145,220,804.40 is: 217,831,206.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,339,626.80 : 435,509,440.20 = 145,220,804.40 : x
  2. Step 2: Convert to fraction form
    290,339,626.80/435,509,440.20 = 145,220,804.40/x
  3. Step 3: Cross multiply
    290,339,626.80x = 435,509,440.20 × 145,220,804.40
  4. Step 4: Simplify right side
    290,339,626.80x = 63,245,031,229,637,696
  5. Step 5: Solve for x
    x = 63,245,031,229,637,696/290,339,626.80
  6. Step 6: Final answer
    x = 217,831,206.60

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1.5x scale

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.