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Finding the Fourth Proportional to 978,827,815.47, 1,350,818,021.43 and 532,769,615.07

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Solution

The fourth proportional to 978,827,815.47, 1,350,818,021.43 and 532,769,615.07 is: 735,241,465.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,827,815.47 : 1,350,818,021.43 = 532,769,615.07 : x
  2. Step 2: Convert to fraction form
    978,827,815.47/1,350,818,021.43 = 532,769,615.07/x
  3. Step 3: Cross multiply
    978,827,815.47x = 1,350,818,021.43 × 532,769,615.07
  4. Step 4: Simplify right side
    978,827,815.47x = 719,674,797,306,880,128
  5. Step 5: Solve for x
    x = 719,674,797,306,880,128/978,827,815.47
  6. Step 6: Final answer
    x = 735,241,465.28

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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.