Home / 515,862,888.17-711,920,673.04-388,475,520.93

Finding the Fourth Proportional to 515,862,888.17, 711,920,673.04 and 388,475,520.93

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Solution

The fourth proportional to 515,862,888.17, 711,920,673.04 and 388,475,520.93 is: 536,118,725.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,862,888.17 : 711,920,673.04 = 388,475,520.93 : x
  2. Step 2: Convert to fraction form
    515,862,888.17/711,920,673.04 = 388,475,520.93/x
  3. Step 3: Cross multiply
    515,862,888.17x = 711,920,673.04 × 388,475,520.93
  4. Step 4: Simplify right side
    515,862,888.17x = 276,563,754,317,299,232
  5. Step 5: Solve for x
    x = 276,563,754,317,299,232/515,862,888.17
  6. Step 6: Final answer
    x = 536,118,725.84

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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.