Home / 786,407,392.80-1,180,366,916.40-398,668,039.20

Finding the Fourth Proportional to 786,407,392.80, 1,180,366,916.40 and 398,668,039.20

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Solution

The fourth proportional to 786,407,392.80, 1,180,366,916.40 and 398,668,039.20 is: 598,385,224.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,407,392.80 : 1,180,366,916.40 = 398,668,039.20 : x
  2. Step 2: Convert to fraction form
    786,407,392.80/1,180,366,916.40 = 398,668,039.20/x
  3. Step 3: Cross multiply
    786,407,392.80x = 1,180,366,916.40 × 398,668,039.20
  4. Step 4: Simplify right side
    786,407,392.80x = 470,574,564,097,738,368
  5. Step 5: Solve for x
    x = 470,574,564,097,738,368/786,407,392.80
  6. Step 6: Final answer
    x = 598,385,224.26

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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.