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Finding the Fourth Proportional to 489,966,415.20, 734,949,622.80 and 478,629,007.20

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Solution

The fourth proportional to 489,966,415.20, 734,949,622.80 and 478,629,007.20 is: 717,943,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,966,415.20 : 734,949,622.80 = 478,629,007.20 : x
  2. Step 2: Convert to fraction form
    489,966,415.20/734,949,622.80 = 478,629,007.20/x
  3. Step 3: Cross multiply
    489,966,415.20x = 734,949,622.80 × 478,629,007.20
  4. Step 4: Simplify right side
    489,966,415.20x = 351,768,208,302,778,432
  5. Step 5: Solve for x
    x = 351,768,208,302,778,432/489,966,415.20
  6. Step 6: Final answer
    x = 717,943,510.80

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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.