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Finding the Fourth Proportional to 390,428.22, 538,582.59 and 237,513.18

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Solution

The fourth proportional to 390,428.22, 538,582.59 and 237,513.18 is: 327,641.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,428.22 : 538,582.59 = 237,513.18 : x
  2. Step 2: Convert to fraction form
    390,428.22/538,582.59 = 237,513.18/x
  3. Step 3: Cross multiply
    390,428.22x = 538,582.59 × 237,513.18
  4. Step 4: Simplify right side
    390,428.22x = 127,920,463,643.54
  5. Step 5: Solve for x
    x = 127,920,463,643.54/390,428.22
  6. Step 6: Final answer
    x = 327,641.44

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1.5x scale

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.