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Finding the Fourth Proportional to 720,763,053.42, 994,660,842.54 and 423,417,828.12

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Solution

The fourth proportional to 720,763,053.42, 994,660,842.54 and 423,417,828.12 is: 584,321,201.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,763,053.42 : 994,660,842.54 = 423,417,828.12 : x
  2. Step 2: Convert to fraction form
    720,763,053.42/994,660,842.54 = 423,417,828.12/x
  3. Step 3: Cross multiply
    720,763,053.42x = 994,660,842.54 × 423,417,828.12
  4. Step 4: Simplify right side
    720,763,053.42x = 421,157,133,664,296,064
  5. Step 5: Solve for x
    x = 421,157,133,664,296,064/720,763,053.42
  6. Step 6: Final answer
    x = 584,321,201.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.