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Finding the Fourth Proportional to 615,148.40, 922,868.40 and 315,675.20

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Solution

The fourth proportional to 615,148.40, 922,868.40 and 315,675.20 is: 473,587.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,148.40 : 922,868.40 = 315,675.20 : x
  2. Step 2: Convert to fraction form
    615,148.40/922,868.40 = 315,675.20/x
  3. Step 3: Cross multiply
    615,148.40x = 922,868.40 × 315,675.20
  4. Step 4: Simplify right side
    615,148.40x = 291,326,666,743.68
  5. Step 5: Solve for x
    x = 291,326,666,743.68/615,148.40
  6. Step 6: Final answer
    x = 473,587.62

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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.