Home / 717,143,905-989,632,459.08-399,587,743.36

Finding the Fourth Proportional to 717,143,905, 989,632,459.08 and 399,587,743.36

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Solution

The fourth proportional to 717,143,905, 989,632,459.08 and 399,587,743.36 is: 551,416,526.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,143,905 : 989,632,459.08 = 399,587,743.36 : x
  2. Step 2: Convert to fraction form
    717,143,905/989,632,459.08 = 399,587,743.36/x
  3. Step 3: Cross multiply
    717,143,905x = 989,632,459.08 × 399,587,743.36
  4. Step 4: Simplify right side
    717,143,905x = 395,445,001,079,584,768
  5. Step 5: Solve for x
    x = 395,445,001,079,584,768/717,143,905
  6. Step 6: Final answer
    x = 551,416,526.48

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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.