Home / 427,077,966.40-640,616,949.60-290,021,300.80

Finding the Fourth Proportional to 427,077,966.40, 640,616,949.60 and 290,021,300.80

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Solution

The fourth proportional to 427,077,966.40, 640,616,949.60 and 290,021,300.80 is: 435,031,951.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,077,966.40 : 640,616,949.60 = 290,021,300.80 : x
  2. Step 2: Convert to fraction form
    427,077,966.40/640,616,949.60 = 290,021,300.80/x
  3. Step 3: Cross multiply
    427,077,966.40x = 640,616,949.60 × 290,021,300.80
  4. Step 4: Simplify right side
    427,077,966.40x = 185,792,561,037,520,064
  5. Step 5: Solve for x
    x = 185,792,561,037,520,064/427,077,966.40
  6. Step 6: Final answer
    x = 435,031,951.20

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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.