Home / 717,143,904-989,632,457.70-399,587,742.36

Finding the Fourth Proportional to 717,143,904, 989,632,457.70 and 399,587,742.36

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Solution

The fourth proportional to 717,143,904, 989,632,457.70 and 399,587,742.36 is: 551,416,525.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,143,904 : 989,632,457.70 = 399,587,742.36 : x
  2. Step 2: Convert to fraction form
    717,143,904/989,632,457.70 = 399,587,742.36/x
  3. Step 3: Cross multiply
    717,143,904x = 989,632,457.70 × 399,587,742.36
  4. Step 4: Simplify right side
    717,143,904x = 395,444,999,538,521,216
  5. Step 5: Solve for x
    x = 395,444,999,538,521,216/717,143,904
  6. Step 6: Final answer
    x = 551,416,525.10

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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.