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Finding the Fourth Proportional to 1,312,480.80, 1,968,721.20 and 470,923.20

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Solution

The fourth proportional to 1,312,480.80, 1,968,721.20 and 470,923.20 is: 706,384.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,480.80 : 1,968,721.20 = 470,923.20 : x
  2. Step 2: Convert to fraction form
    1,312,480.80/1,968,721.20 = 470,923.20/x
  3. Step 3: Cross multiply
    1,312,480.80x = 1,968,721.20 × 470,923.20
  4. Step 4: Simplify right side
    1,312,480.80x = 927,116,487,411.84
  5. Step 5: Solve for x
    x = 927,116,487,411.84/1,312,480.80
  6. Step 6: Final answer
    x = 706,384.80

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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.