Home / 830,489,670.60-1,246,212,802.80-313,291,289.40

Finding the Fourth Proportional to 830,489,670.60, 1,246,212,802.80 and 313,291,289.40

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Solution

The fourth proportional to 830,489,670.60, 1,246,212,802.80 and 313,291,289.40 is: 470,117,365.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,489,670.60 : 1,246,212,802.80 = 313,291,289.40 : x
  2. Step 2: Convert to fraction form
    830,489,670.60/1,246,212,802.80 = 313,291,289.40/x
  3. Step 3: Cross multiply
    830,489,670.60x = 1,246,212,802.80 × 313,291,289.40
  4. Step 4: Simplify right side
    830,489,670.60x = 390,427,615,855,999,872
  5. Step 5: Solve for x
    x = 390,427,615,855,999,872/830,489,670.60
  6. Step 6: Final answer
    x = 470,117,365.31

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1.5x scale

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.