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Finding the Fourth Proportional to 878,602,759.12, 1,317,980,734.54 and 288,215,985.52

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Solution

The fourth proportional to 878,602,759.12, 1,317,980,734.54 and 288,215,985.52 is: 432,349,104.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,602,759.12 : 1,317,980,734.54 = 288,215,985.52 : x
  2. Step 2: Convert to fraction form
    878,602,759.12/1,317,980,734.54 = 288,215,985.52/x
  3. Step 3: Cross multiply
    878,602,759.12x = 1,317,980,734.54 × 288,215,985.52
  4. Step 4: Simplify right side
    878,602,759.12x = 379,863,116,301,819,584
  5. Step 5: Solve for x
    x = 379,863,116,301,819,584/878,602,759.12
  6. Step 6: Final answer
    x = 432,349,104.71

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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.