Home / 642,048,015.20-963,072,022.80-478,548,802.40

Finding the Fourth Proportional to 642,048,015.20, 963,072,022.80 and 478,548,802.40

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Solution

The fourth proportional to 642,048,015.20, 963,072,022.80 and 478,548,802.40 is: 717,823,203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,048,015.20 : 963,072,022.80 = 478,548,802.40 : x
  2. Step 2: Convert to fraction form
    642,048,015.20/963,072,022.80 = 478,548,802.40/x
  3. Step 3: Cross multiply
    642,048,015.20x = 963,072,022.80 × 478,548,802.40
  4. Step 4: Simplify right side
    642,048,015.20x = 460,876,963,135,885,440
  5. Step 5: Solve for x
    x = 460,876,963,135,885,440/642,048,015.20
  6. Step 6: Final answer
    x = 717,823,203.60

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Similar ratio
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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.