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Finding the Fourth Proportional to 702,158,946.12, 968,967,470.48 and 388,886,434.02

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Solution

The fourth proportional to 702,158,946.12, 968,967,470.48 and 388,886,434.02 is: 536,656,701.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,158,946.12 : 968,967,470.48 = 388,886,434.02 : x
  2. Step 2: Convert to fraction form
    702,158,946.12/968,967,470.48 = 388,886,434.02/x
  3. Step 3: Cross multiply
    702,158,946.12x = 968,967,470.48 × 388,886,434.02
  4. Step 4: Simplify right side
    702,158,946.12x = 376,818,304,274,402,368
  5. Step 5: Solve for x
    x = 376,818,304,274,402,368/702,158,946.12
  6. Step 6: Final answer
    x = 536,656,701.96

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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.