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Finding the Fourth Proportional to 615,487.70, 922,713.15 and 319,999.70

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Solution

The fourth proportional to 615,487.70, 922,713.15 and 319,999.70 is: 479,730.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,487.70 : 922,713.15 = 319,999.70 : x
  2. Step 2: Convert to fraction form
    615,487.70/922,713.15 = 319,999.70/x
  3. Step 3: Cross multiply
    615,487.70x = 922,713.15 × 319,999.70
  4. Step 4: Simplify right side
    615,487.70x = 295,267,931,186.06
  5. Step 5: Solve for x
    x = 295,267,931,186.06/615,487.70
  6. Step 6: Final answer
    x = 479,730.03

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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.