Home / 438,980,731.65-658,407,001.63-128,004,782.81

Finding the Fourth Proportional to 438,980,731.65, 658,407,001.63 and 128,004,782.81

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Solution

The fourth proportional to 438,980,731.65, 658,407,001.63 and 128,004,782.81 is: 191,988,484.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,980,731.65 : 658,407,001.63 = 128,004,782.81 : x
  2. Step 2: Convert to fraction form
    438,980,731.65/658,407,001.63 = 128,004,782.81/x
  3. Step 3: Cross multiply
    438,980,731.65x = 658,407,001.63 × 128,004,782.81
  4. Step 4: Simplify right side
    438,980,731.65x = 84,279,245,243,088,448
  5. Step 5: Solve for x
    x = 84,279,245,243,088,448/438,980,731.65
  6. Step 6: Final answer
    x = 191,988,484.15

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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.