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Finding the Fourth Proportional to 615,238.16, 921,070.06 and 358,287.31

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Solution

The fourth proportional to 615,238.16, 921,070.06 and 358,287.31 is: 536,390.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,238.16 : 921,070.06 = 358,287.31 : x
  2. Step 2: Convert to fraction form
    615,238.16/921,070.06 = 358,287.31/x
  3. Step 3: Cross multiply
    615,238.16x = 921,070.06 × 358,287.31
  4. Step 4: Simplify right side
    615,238.16x = 330,007,710,920.55
  5. Step 5: Solve for x
    x = 330,007,710,920.55/615,238.16
  6. Step 6: Final answer
    x = 536,390.18

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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.